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What happens when a Duramax engine goes down?

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What happens when a Duramax engine goes down?

Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.

What causes a truck to not shift gears?

If you have no lights, move on to step 2. Incorrect reading from the MAF could result in all sorts of transmission weirdness. Soft shifting, hard shifting, odd shift points, etc. Harsh shifts. Stuck in D or 2. Hard shifting.

What causes the crankshaft on a Duramax to crack?

Or how about the fact that the rods in the LB7 and LLY engines can bend with added power and the LBZ and LMM mills are notorious for cracking pistons? Discover the worst failure point (s) of your Duramax in the article that follows, along with how to address it. 1. Snapped Crankshaft

What kind of compression ratio does a Duramax have?

Thanks to a 17.5:1 compression ratio (the highest of any other engines in the Duramax lineage), extreme amounts of low-rpm cylinder pressure (i.e. torque) can be present when you’ve more than doubled the factory horsepower and torque rating.

Why is my Duramax not shifting out of 2nd gear?

Hey guy my name is john I have a 2001 2500hd duramax and it seems to me it’s not shifting out of either second or 3rd and the shift indicator lights work perfect but staying stuck in either 2 nd or 3rd gear any help would be so greatly appreciated 04LLYDMAX…. Did you ever figure out your problem?

Are there any problems with my 2003 Duramax?

Thaks for the help. injectors,water pump,headgaskets,injectors again,instrument cluster,steering shaft,pinion seal,and injectors again. I have on 03 with 66,000 on it and know problems. Friend of mine has 03 asmost same truck and know problems with 145,000 on it. Sure love mine. P:S Injectors should be warrantied to 200,000.

When to submit a repair order for a 2003 Duramax?

Claims with repair orders prior to May 25, 2004 must be submitted to the Service Contract provider. For 2003 vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after October 10, 2006 are covered by this special policy and must be submitted using the labor operation codes provided with this bulletin.

Why is the Speedo not working on my Duramax?

Speedo isn’t working and the service Brake system light is on along with the parking brake indicator and the abs lamp. Still isn’t showing the gear indicator. What other speed sensors does this truck have?

What to do if your truck doesn’t reverse?

When I got to the warehouse location, I tried to turn around in the parking lot and had no reverse whatsoever. The instrument panel indicator simply blinked the R continuously. Put the selector back in D and forward gears worked fine…still, no reverse. Shut the truck off and restarted, no change.

What kind of pump does a Duramax cp4.2 use?

Like all Duramax engines from ’01-’10, the LML was also void of a lift pump from the factory. This means that not only does the CP4.2 have to pressurize fuel as high as 29,000 psi before sending it to the rails, but it also has to pull its low pressure fuel from the tank.

When I got to the warehouse location, I tried to turn around in the parking lot and had no reverse whatsoever. The instrument panel indicator simply blinked the R continuously. Put the selector back in D and forward gears worked fine…still, no reverse. Shut the truck off and restarted, no change.

Can a 2002 D / A have no reverse?

Friday a 2002 d/a shows up at the shop with no reverse and a tcc code. Sorry, I wrote the code down and left it at the shop. I had the laptop on it and tested the F solenoid which tested okay!

Why does my Allison 5 speed have no reverse?

Try taking video with a camera/camera phone and show the video to the dealer to avoid the can not duplicate problem issue. Friday a 2002 d/a shows up at the shop with no reverse and a tcc code. Sorry, I wrote the code down and left it at the shop.

What does it mean when your engine hesitates under load?

An engine that hesitates, stumbles or misfires when accelerating or when it is under load, is an engine that is either sucking too much air, not getting enough fuel, or misfiring. If the Check Engine Light comes on, you may find any of the following codes: P0171, P0174 Lean fuel condition codes P0120 to P0124 Throttle position sensor codes

Are there any problems with the LLY Duramax?

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

Are there any issues with the Duramax check engine lights?

Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs. The glow plugs burn out over time and can be a real nuisance to remove from the aluminum heads sometimes.

Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

What to do about a Duramax 6.6 LB7 engine?

If you are having a problem with your 2001-2004 Duramax 6.6 LB7 diesel engine, please feel free to give us a call. We carry a full line of repair and performance parts for these engines that we install in our shop on a regular basis. Odds are we have run across your problem before and would be glad to help. Call us at 1-877-367-9351.

Why are the Pistons on my Duramax not working?

Low-quality castings from its suppliers and a reduced amount of meat present in the wrist pin area (thanks to the use of wrist pin bushings) are to blame for factory piston failure. In most cases, the cast-aluminum piston cracks along the center line of the wrist pin, as shown above.

Is the water pump on the LB7 Duramax leaking?

Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump. Be prepared though because you will have to remove the dampner pulley to get the pump off.

Are there any Duramax engines in the Chevy Silverado?

The motor, sometimes referred to as Baby Duramax, was slated to be offered in GM’s light duty pickup trucks – the Chevrolet Silverado 1500 and GMC Sierra 1500 – for the 2010 model year. However, after fully completing development of the engine, GM decided not to produce it due to reasons associated with the “economic climate”.

When does a Duramax diesel engine start leaking fluid?

Leaks are most common when the fluid is cold and on trucks running high idles. Some folks have a consistent leak while others tend to only leak when the engine is cold. Fluid leaks are important to catch early as running low on fluid can cause catastrophic damage to the transmission.

Are there any problems with the Duramax engine?

The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations.

Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump. Be prepared though because you will have to remove the dampner pulley to get the pump off.

What to do if your Duramax cooler goes bad?

Lastly we replace a fair amount of glow plug controllers as well. You will usually get a diagnostic trouble code for the cooler when they go bad. Head Gaskets – As these truck reach the 100,000-150,000 miles we are seeing more and more head gasket issues. The Duramax has a multi-layer steel head gasket.

How can I Keep my Duramax Diesel pump healthy?

However, there are measures you can take to keep the pump happy and healthy, the first being to always buy your diesel from a high-traffic, reputable filling station that’s known to dispense good, clean fuel. Second, always change the fuel filter at or before the recommended service interval.

What causes a Duramax injection pump to fail?

As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it won’t allow the LML Duramax to run. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.

How to get rid of white smoke from a Duramax engine?

1. Remove IGN 1 relay. 2. Remove the glow plug from the suspect cylinder (s). 3. Crank the engine and check for fuel spray coming out of the glow plug hole. Caution: Make sure you are not in front of the glow plug hole during this process. 4. Replace any injectors on the cylinders that spray fuel.

Are there any issues with the Duramax primer button?

Under the primer button there are some orings that fail on a regular basis. This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs.

Can a Duramax engine crank but won’t start?

Drove home 5 miles. came out several hours later, engine cranks normally but won’t fire. Held throttle down and it started. Had slight surging. Very slight. Drove 5 miles, had dinner, came out, crank but no start. Held throttle down and still no start.

How many versions of the Duramax diesel engine are there?

All told, there are six different iterations of the Duramax diesel engine: LB7, LLY, LBZ, LMM, LML, and L5P spanning from 2001 to the present day. Each version of the engine has its own issues and quirks, and some are less problematic than others.

Are there any issues with the Duramax pickup?

This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs. The glow plugs burn out over time and can be a real nuisance to remove from the aluminum heads sometimes.

What makes a Duramax LB7 diesel so special?

The introduction of common rail injection powered by the Bosch CP3 injection pump made the LB7 Duramax stand apart from other diesels of the day with excellent power and efficiency.

If you are having a problem with your 2001-2004 Duramax 6.6 LB7 diesel engine, please feel free to give us a call. We carry a full line of repair and performance parts for these engines that we install in our shop on a regular basis. Odds are we have run across your problem before and would be glad to help. Call us at 1-877-367-9351.

Are there any problems with the Duramax water pump?

This seems to be inherent of the factory water pump design. Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

Why is my Duramax diesel engine not working?

The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement.

When did GMC Duramax lose power under load?

In 2012 there was a P1093 code and the dealer invoice states “…low rail pressure during enrichment. Command high fuel rail pressure, pressure drops. Follow diagnostic chart, test system pressure, relief valve failed” so they replaced the FPRV.

What kind of engine is a Duramax Diesel?

The Duramax diesel engine is a good example of this. This is a V8 diesel engine which comes from General Motors and is made specifically for trucks. Duramax is a diesel engine product line that is synonymous with quality. You’ll find their engines in everything from small pickup trucks to bigger hauling trucks.

Is the Chevy Duramax LML diesel a failure?

While the failure is a well-known issue, it seems the occurrences are hit or miss, sometimes even sporadic.

Is it expensive to replace a Duramax diesel engine?

Any vehicle for sale which has a Duramax diesel engine in it is bound to be expensive. And if you ever need to get the engine replaced, you mine as well purchase a new vehicle instead. Expensive Repair Costs – The Duramax diesel engine is certainly not like a regular diesel engine.

When did the Duramax LML diesel engine come out?

Following the short lived LLY engine, the Duramax LML was introduced in 2011. Featured in the same 2500 and 3500 HD work trucks, the LML sported the same 6.6L turbo-diesel design that Chevy diesel trucks have been using since 2001.

Any vehicle for sale which has a Duramax diesel engine in it is bound to be expensive. And if you ever need to get the engine replaced, you mine as well purchase a new vehicle instead. Expensive Repair Costs – The Duramax diesel engine is certainly not like a regular diesel engine.

Hey guy my name is john I have a 2001 2500hd duramax and it seems to me it’s not shifting out of either second or 3rd and the shift indicator lights work perfect but staying stuck in either 2 nd or 3rd gear any help would be so greatly appreciated 04LLYDMAX…. Did you ever figure out your problem?

What to do if your Duramax crankshaft is weak?

The ultimate fix for the weak factory crankshaft is to replace it with a stronger unit that’s been internally balanced. The billet Callies crankshaft available through Wagler Competition Products is machined from triple heat treated 4330V steel and features reduced rod journal widths for improved strength (which calls for narrower rods).

Speedo isn’t working and the service Brake system light is on along with the parking brake indicator and the abs lamp. Still isn’t showing the gear indicator. What other speed sensors does this truck have?

What was the code name for the Duramax in 2011?

In an effort to keep up with the ever-tightening emission regulations, GM redesigned its Duramax for the 2011 model year, and this time the code name was LML.

However, there are measures you can take to keep the pump happy and healthy, the first being to always buy your diesel from a high-traffic, reputable filling station that’s known to dispense good, clean fuel. Second, always change the fuel filter at or before the recommended service interval.

What causes the injector on a Duramax to fail?

The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat. The solenoid style Bosch units found in the LB7 employed a non-hardened internal ball seat to seal the injector.

What are the problems with the Duramax LB7?

One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.

What happens when a Chevy Duramax diesel truck breaks?

As soon as one aluminum chip or shaving is dislodged, an irreversible chain reaction starts, which causes more and more wear to take place, which generates more and more debris, which in turn causes more wear and the cycle keeps getting worse until the injection pump won’t develop fuel pressure and the truck simply won’t run anymore.

As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it won’t allow the LML Duramax to run. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.

Is there turbo lag on a 2006 Duramax?

The older generations of the Duramax had varying degrees of “turbo lag” which is why I didn’t buy one. Most of the 2006s have the LBZ engine and every LBZ I’ve driven had no lag at all…the instant response was right there!!! I would have to think that there is some sort of problem with the truck.

Low-quality castings from its suppliers and a reduced amount of meat present in the wrist pin area (thanks to the use of wrist pin bushings) are to blame for factory piston failure. In most cases, the cast-aluminum piston cracks along the center line of the wrist pin, as shown above.

Or how about the fact that the rods in the LB7 and LLY engines can bend with added power and the LBZ and LMM mills are notorious for cracking pistons? Discover the worst failure point (s) of your Duramax in the article that follows, along with how to address it. 1. Snapped Crankshaft

What causes the injector on a Duramax to leak?

Leaking Injectors—LB7 One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.

What kind of engine does a GM Duramax have?

It’s been said before, but that doesn’t make it any less true: The 6.6L Duramax is one heck of an engine. In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use.

How many miles does a 2005 GMC Duramax have?

A 2005 GMC Goes The Distance! I magine driving your truck 400 miles today, 400 miles tomorrow, and 400 miles every single day for the next 5 years (that’s 1825 days). If you did, your Duramax would have what this truck has – more than 750,000 miles on the odometer.

How many miles has a Duramax truck traveled?

A few Duramax owners have made a living with their truck doing this. This is one of those trucks. This truck would be considered to be in great shape if someone said it had covered just 100,000 miles, but for having traveled the equivalent of 31 times around the Earth, this truck’s condition is truly remarkable.

How many miles does a GMC 2500HD get?

This particular 2005 GMC 2500HD was driven off the lot at McCaddon GMC in Boulder, Colorado on March 14, 2005. From that day forward, it averaged a little more than 400 miles every day for the next 5 years. The RV HotShot owner recently traded this 751K-mile GMC for a brand new Duramax-equipped Chevy, and hopes to continue his mile-making marathon.

Are there any issues with the Duramax fuel pump?

The new injectors available from us and others are updated and do not have the cracking issue. Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank. The injection pump sucks all the fuel from the tank.

What causes head gasket failure on LLY Duramax?

Head Gasket Failure – LLY Duramax The LLY has the largest turbo in it out of any other 6.6L Duramax variants. Outside of it being the largest turbo, it had the largest compressor wheel and the tallest exhaust vanes. The end result is having an extremely efficient and high-flowing turbocharger.

Are there any problems with the GM Duramax?

In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use. Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic.

It’s been said before, but that doesn’t make it any less true: The 6.6L Duramax is one heck of an engine. In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use.

Are there any major problems with the L5P duramax?

Mechanically, the L5P Duramax is stout and very few major problems have been reported. One common problem is with the MAP sensor however, as it tends to clog with soot and throw a check engine light, but a simple MAP sensor spacer and a can of electrical cleaner can get you back on the road worry free and prevent the soot from building up again.

Are there any problems with my 2005 Chevy Silverado?

First dealer had it for a whole day and said it was fine, they saw NO smoke, then gave me some BS that any repairs would have to be done at a previous dealer (another city) since they changed 2 injectors already. Well after about another month it got worse and I called the GM warranty line.

How to stop a Duramax truck from losing Prime?

Tried running fuel line from injection pump to tank of diesel.. No go Pressurized the fuel tank primed it and tried starting.. Nothing Pressurized fuel tank sprayed soap water on lines.. No leaks found Tried having someone prime while I cranked. Truck will run off starting fluid through airbox but dies when you stop spraying.

Why does my GMC Duramax not start up?

Sat in drive way moved it around a couple of times and parked it in the garage to do tcase. Almost two months later I finally finished it and now it won’t start. Acts like it will, fires up then dies right aways like the fuel shut off.

Are there any Duramax years I should avoid?

Drivetrain is the same as your 2011 up til 2016. 2017 to current is L5P platform and looses the infamous CP4 pump Personally, as of now, the LML years (11-16) are the only ones that I would try to avoid unless the CP4 was replaced with a CP3. The L5P’s seem to be pretty solid.

What happens when a Duramax CP4 pump fails?

CLICK HERE to purchase our LML CP4 High Pressure Fuel Pump Failure Kit The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates.

When did the Duramax LML diesel come out?

The chart below follows the progression of the Duramax diesel, from the first LB7 to the more recent LML. The LBZ was introduced in 2006 and eventually replaced the LLY by 2007. The 2006 LLY featured many changes to boost torque.

Drivetrain is the same as your 2011 up til 2016. 2017 to current is L5P platform and looses the infamous CP4 pump Personally, as of now, the LML years (11-16) are the only ones that I would try to avoid unless the CP4 was replaced with a CP3. The L5P’s seem to be pretty solid.

When did the GMC Duramax Denali 2500 come out?

Enter your ride HERE to be a part of this months Ride of the Month Challenge! I purchased a new 2020 GMC Denali 2500 with the Duramax back around March 14, 2020. The truck that I bought had right around 300 miles on it when I bought it.

When did I buy my new GMC Duramax?

I purchased a new 2020 GMC Denali 2500 with the Duramax back around March 14, 2020. The truck that I bought had right around 300 miles on it when I bought it. At 521 miles, I got the first CEL and immediately took it to my local GM dealer that happened to be a Chevrolet Dealer.

When to replace Alternators on Chevy Duramax Diesel?

In fairness, I had a 2000 Ford F-350 XLT CC, LWB I drove for 267K and replaced 2 alternators, 2 H20 pumps and brakes, tires and batteries in. That truck didn’t need it’s first alignment until 150K.

Where does the General Motors Duramax V8 engine come from?

Jump to navigation Jump to search. The Duramax is a General Motors V8 diesel engine family for trucks. The 6.6-liter Duramax is produced by DMAX, a joint venture between GM and Isuzu in Moraine, Ohio. The Duramax block and heads are poured at The Defiance GM Powertrain foundry in Defiance, Ohio.

Is the LMM Duramax a reliable diesel truck?

The DPF system and the regeneration process it undergoes is one of the LMM Duramax truck’s biggest problems. Despite the DPF system, the LMM Duramax is still a reliable and capable diesel. You can find everything you need to know about this truck in our LMM Duramax specifications chart below.

Are there any flaws in the Cummins Duramax?

Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic. For example, did you know the injection pump on the LML version is prone to coming apart and wrecking the entire high-pressure fuel system when it does?

What causes a Duramax diesel engine to heat up?

When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp.

Are there any problems with the Duramax LMM?

One problem can rear its head when you are pushing the power of the LMM to a level GM never imagined, and that’s with the pistons. Simply put, they can crack under pressure. There are a lot of factors which dictate the power level where a piston bites the dust, but it’s usually north of 600 horsepower.

What was the problem with the LBZ Duramax in 2006?

Glow plug failure was a concern on the 2006 model year LBZ and LLY Duramax models, but the problem should have been long corrected for owners of these years. The concern was that the glow plug module would over cycle the glow plugs, creating a scenario in which the tip of the glow plug could actually deform and/or break off in the engine.

This seems to be inherent of the factory water pump design. Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

One problem can rear its head when you are pushing the power of the LMM to a level GM never imagined, and that’s with the pistons. Simply put, they can crack under pressure. There are a lot of factors which dictate the power level where a piston bites the dust, but it’s usually north of 600 horsepower.

Why is my Chevy Silverado 2500 not working?

While there are a variety of reasons your Chevrolet Silverado 2500 HD air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. What will be the outcome of an air conditioning system diagnosis?

What kind of car is a 2004 Chevy Silverado 3500?

Description: Used 2004 Chevrolet Silverado 3500 with Towing Hitch, Upgraded Engine, AWD/4WD, Rear Bench Seats, 8ft Bed.

The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat. The solenoid style Bosch units found in the LB7 employed a non-hardened internal ball seat to seal the injector.

Why does my diesel truck not start up?

Read on another thread where the truck would not start,turned out to be cps,dealer said a couple bolts backed out and fell into the pan. First- these trucks do not have a fuel pump- the CP3 pulls fuel from the tank and then pressurized by the CP3 pump to the injectors.

What makes a Chevy Duramax LML-Diesel Break?

In order to produce such high pressure inside the fuel rail, the internal parts of the CP4 are machined to a very precise and tight tolerance and diesel fuel is the only lubricant the moving parts have, which is the root of the problem.

Under the primer button there are some orings that fail on a regular basis. This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs.

Which is better Chevy Silverado or Ford Duramax?

And compared to similar diesel half-tons from Ford and Ram, our Duramax test truck is the fleetest of the bunch, beating both of its competitors to 60 mph by more than half a second. Otherwise, this diesel-powered Silverado is just like other Silverados, for better or worse.

Where do you drive a Chevy Silverado Duramax?

We drove the Silverado 1500 Duramax mostly in and around central Oregon’s valleys, exploring the outer reaches of prudence to maximize fuel efficiency and to experience the truck in a way no sane person ever will.

Why is my Silverado Sierra sluggish to accelerate?

Have a KN intake system on it and keep it clean so I dont think that is it but I havent really done anything else as far as modifications. After accelerating it feels like it starts to let loose and eventually seems to get up to speed. Any ideas of what I can do? Get a custom tune. I would get an exhaust of some sort to help with the tune.

What kind of transmission does a Duramax have?

The all-new Allison ® 10-speed automatic transmission is designed specifically for heavy-duty trucks to deliver more strength, improved efficiency and a smoother driving experience than before. Plus, the available Duramax ® 6.6L Turbo-Diesel V8 generates 445 horsepower and 910 lb.-ft. of torque.

What’s the problem with my Silverado 4.3 V6?

2007 Silverado 4.3 V6 -39,000 miles…no engine or tranny mods. No exhaust. I do have a K&N air filter that I just cleaned. I don’t think I have that MAF sensor on my intake like the more expensive trucks do. My problem seems to be a lack of power, like it just doesn’t want to go (V6 jokes aside).

Have a KN intake system on it and keep it clean so I dont think that is it but I havent really done anything else as far as modifications. After accelerating it feels like it starts to let loose and eventually seems to get up to speed. Any ideas of what I can do? Get a custom tune. I would get an exhaust of some sort to help with the tune.

Why does my transmission not shift into 2nd gear?

My 1998 Chevy Z71 with a vortec 5.7 has a problem. At first i thought it was the transmission but now i am relatively sure it has something to do with … read more Automotive Repair/Damage… I have 1985 Corvette with Automatic Tranny. Tran will not shift into 2nd gear. going up you let of gas and it shifts to drive or OD, and coming … read more

When does a Duramax chev.p.u.lose power?

Duramax Chev. P.U. (2003) loses fuel prime and motor stops running at low RPM or at an idle. No visible leak around filter area. Fuel pressure … read more Vocational, Technical or Tra… Hi, I just purchased a 2004 Kodiak C4500 crewcab with the Duramax diesel engine mated to an Allison with 4:44 gear ratio. What rpm do you … read more

Why does my Duramax not run over 30 mph?

Took it to dealership because of a surge at idle, and at 55 to 60 mph. Dealership replaced fuel pressure regulator. $900.00 dollars later and a half mile down … read more I have a 2003 Chevy 4500. New injectors, new fuel filter. Will not run over 30 mph. Could it be a lift pump?

Why does my Chevy Silverado lose engine power?

Keep reading to find at least one possible answer to “Why is my Chevy Silverado losing power?” Read More: How Can You Tell If Your Pickup Is Overloaded? If your GM truck occasionally loses the ability to accelerate and warns you of reduced engine power, that could be caused by a faulty throttle body.

Can a GMC Duramax run with no trailer?

Dropped the boat, let it sit a while then it ran great with no trailer. Took it back and they replaced “some fittings”. So 2 months later, I don’t fish near enough, I drove it 8 hrs to the coast and hooked up to a boat. It ran about 5 miles. Same thing , light comes on loss of power but can feather it up to 40-50 but cant push it.

Are there any problems with the Duramax fuel pump?

It can also be relatively difficult to prime the fuel system once air has been introduced into the system, such as when the fuel filter is changed. The 2001 to 2004 LB7 fuel filter housings seem to be the most prone to problems. Water pump failures for Duramax engine are somewhat common.

Are there any problems with the Commons 6.6L Duramax Diesel?

Common Problems with the 6.6L Duramax Diesel. The 6.6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation.

One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.

What is the diagnostic code for a Chevy Duramax?

Below are common check engine light trouble codes for the Chevy/GM Duramax diesel. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. At Thoroughbred Diesel we are a real diesel performance and repair shop that offers free advice. Call us at 1-866-737-4966 with any questions you may have about your diesel.

Are there any problems with the LB7 Duramax?

It is extremely important to have the heads surfaced flat before putting the truck back together. Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump.

All told, there are six different iterations of the Duramax diesel engine: LB7, LLY, LBZ, LMM, LML, and L5P spanning from 2001 to the present day. Each version of the engine has its own issues and quirks, and some are less problematic than others.

In an effort to keep up with the ever-tightening emission regulations, GM redesigned its Duramax for the 2011 model year, and this time the code name was LML.

What kind of transmission does a Duramax diesel use?

It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.

What to do if your Duramax engine is leaking?

These problems can be prevented by ensuring you are driving your Duramax on the highway enough and being cautious of not interrupting the regeneration process while its taking place. Using a fuel additive such as AMSOIL Diesel Concentrate can help the fuel burn cleaner and therefore reduce particulate build-up. 2. Leaking Transmission Lines

What causes a transmission line to leak in a Duramax?

LMM Leaking Transmission Line Symptoms 1 Overheating transmission temps 2 Red fluid dripping underneath the car 3 Hard shifting

Is the 2006 2500HD D / A running fine?

My 2006 2500HD D/A was running fine this past weekend. I parked it in my driveway on Saturday. I moved it to my side driveway on Sunday, took about 5 minutes of running. Shut it off and came back a few minutes later to restart it. It would start very easy, and run for about 2 seconds then die.

What’s the Check Engine light on a Duramax?

Started up fine. Only thing i noticed was that the oil pressure was pegged out at 120 and the battery was around 10 or 11 marker on the gauge. Ran and drove fine. Keep in mind the temp was around 18F this morning when i left for work. You will need a scanner to pull the codes.

Why does my Chevy Duramax not turn over?

Engine won’t turn over with key at all. Batteries are hot. You can take a power probe and shoot 12v to starter solenoid wire and it will crank and run fine. I traced that wire back to the fuse panel under the hood on the driver’s side. There is a CRANK fuse as well as a starter relay in that panel.

Why did my 2004 Duramax engine not start?

My 2004 Duramax started and then died like it was out of fuel. Now it won’t start. I have about 1/4 tank of fuel, tried priming it until the batteries died.

Is there a recall on the GM cracked dash?

If you haven’t yet, you may also want to join this Facebook group for ongoing updates from other GM owners who are facing the same cracked dashboard issue.

Is the Chevy Silverado affected by the cracked dash?

Years after complaints first emerged against General Motors, owners are still seeking solutions to their cracked dash woes. If you own a Chevrolet Silverado or Tahoe, or any of the other 2007 to 2014 model-year GM vehicles that were affected by this frustrating issue, we’ve got an update for you.

Is there a lawsuit against GM for Cracked dash?

On February 8, 2019, the court ruled in favor of GM and dismissed the case. Despite this ruling, however, the court granted plaintiffs the opportunity to replead some of their claims. In the meantime, owners still facing cracked dash problems can file a complaint with the National Highway Traffic Safety Administration (NHTSA).

Are there any cracked dashboards in Chevy Tahoes?

What they found was that there had been numerous complaints concerning cracked dashboards on the NHTSA database, with at least eight of them coming from owners of the same vehicle. There were also around 34 similar complaints from 2008 Chevy Tahoe owners. WMC Action News 5 appealed to the NHTSA on Moncrief’s behalf, but to no avail.

When does Allison Transmission detent lever / neutral safety switch go bad?

Allison Transmission Detent Lever / Neutral Safety Switch Also known as a PRNDL switch. When this sensor goes bad, you’ll likely get a “shift range inhibited” message on the message center along with a flashing light under the gear or range you are attempting to shift to.

Where is the neutral start back up switch?

The vehicle is equipped with a column type shift selector. In addition to the column shifter, another component associated with the shift selector is the Neutral Start Back Up (NSBU) switch mounted on the selector shaft of the transmission internally. The NSBU switch transmits the gear selector position information to the TCM.

The ultimate fix for the weak factory crankshaft is to replace it with a stronger unit that’s been internally balanced. The billet Callies crankshaft available through Wagler Competition Products is machined from triple heat treated 4330V steel and features reduced rod journal widths for improved strength (which calls for narrower rods).

What causes a Duramax to overheat in the summer?

Overheating typically occurs while towing in the Summer months, and is most prevalent in 2005 or earlier models (2006+ models received a larger radiator and fan). Overheating often occurs as a result of a fan clutch failure, preventing the engine fan from providing supplemental airflow as necessary to keep the engine from overheating.

Are there any concerns about the aluminum cylinder heads on the Duramax?

The truth of the matter is that there are no concerns regarding the aluminum cylinder heads on any generation of the 6.6L Duramax. With over 1,000,000 Duramax engines on the road today, the aluminum cylinder head design has yet to be identified (with any credibility) as an inherent problem for Duramax owners.

Leaking Injectors—LB7 One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.

The chart below follows the progression of the Duramax diesel, from the first LB7 to the more recent LML. The LBZ was introduced in 2006 and eventually replaced the LLY by 2007. The 2006 LLY featured many changes to boost torque.

When did the Duramax Allison diesel engine come out?

The Duramax-Allison combination was first introduced for the 2001 model year, replacing the 440 lb-ft Detroit diesel with the 500 lb-ft LB7.

What’s the RPM on a 2005 GMC Duramax?

Check out the thread “2005 6.6 max rpm 2000”, there are some suggestions there. Also search for the “ice pick trick” as it is one of the suggestions that often comes up for this problem.

What causes a Chevy 2500HD to lose power under load?

Probably P0087. Check the fuel hoses at the side of the trans– they can get kinked, weak and collapse. I’ve just experienced a very similar situation with my 2005 2500HD. After driving about 2 hours, over varying terrain, I had to stop at a light (not the first on the trip).

When is the GMC Duramax going to the dealer?

It’s going to the dealer’s on Wednesday, but I’d like to know if anyone has any further suggestions on what may be going on here.

What should I do if my Duramax engine wont start?

With the engine OFF, loosen fuel filter assembly plastic bleed screw a turn or so, and depress the round priming pump on top of FF assembly until fuel squires out of vent. CAREFULLY close plastic vent nut with fingers or nutdriver. Depress pump until firm. Barely finger tight with nutdriver is all you need.

Are there any problems with the Duramax diesel engine?

Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

The truth of the matter is that there are no concerns regarding the aluminum cylinder heads on any generation of the 6.6L Duramax. With over 1,000,000 Duramax engines on the road today, the aluminum cylinder head design has yet to be identified (with any credibility) as an inherent problem for Duramax owners.

How long does a GMC Duramax remote start last?

The most it will go on factory is 20 min or two remote starts from the threads I have read which like you said will not even come close to warming our trucks. Also if anyone reading this is unaware you can repeat the start sequence prior to the first 10 min start ends, say at 9 min and it will extend for an additional 10 min.

What happens if the crankshaft on a Duramax goes bad?

Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet.

What kind of crankshaft does a Duramax use?

For a more budget-friendly option, a properly balanced Compstar forged crankshaft (also made by Callies) has shown great results in the sub-1,000hp arena. In an effort to reduce crankshaft fatigue on the front of the crankshaft, alternate fire camshafts are employed.

Like all Duramax engines from ’01-’10, the LML was also void of a lift pump from the factory. This means that not only does the CP4.2 have to pressurize fuel as high as 29,000 psi before sending it to the rails, but it also has to pull its low pressure fuel from the tank.

Why is the OBD on my Silverado Sierra not working?

The guy told me his computer can’t connect to the OBD for some reason, so he couldn’t pass me he said it might be a fuse or smth. Truck is 07 NBS Sierra CrewCab w/ 120 K miles. I checked the manual, but could not see anything in fuse section about OBD.

What kind of connecting rod does a Duramax have?

We’ll be honest, experiencing a tweaked connecting rod in an LB7 Duramax (’01-‘04) or LLY Duramax (’04.5-’05.5) is almost exclusively reserved for engines making double the factory horsepower (or more).

Where is the CP3 injection pump in a Duramax?

The CP3 injection pump sits in the valley of the engine between the cylinder heads and is driven by the camshaft gear, and it has two main jobs: get fuel from the tank up to the engine, and pressurize the fuel to 26,000psi and ultimately inject it into the engine.

What happens when I put my Duramax in limp mode?

While in limp mode, the transmission will lock in 3rd gear, the torque converter will remain unlocked, and the transmission will not be able to operate in reverse. It’s great to have such a fail safe, but in many instances the limp mode is activated when it’s not entirely necessary.

Is the GMC Duramax compatible with diesel fuel?

The Detroit News reports that GM is now facing a class-action suit alleging its 6.6-liter Duramax engine found in 2011-2016 Chevrolet and GMC models is not compatible with US diesel fuel.

What was the problem with my Chevy Silverado?

The computer scan confirmed the problem: two of the eight injectors were starting to fail. If the problem is left unattended, it will get worse and it may cause damage to the pistons and the engine itself. I made the difficult and costly decision to replace all eight injectors.

Why does my Silverado keep running without the key?

SILVERADO3 ill take a look i really dont like to mess wit the truck being that that seem to be like an electrical problem dont want to mess anything up more than what already is but doesnt hurt to try thanks ill let you know what i come up with.

The computer scan confirmed the problem: two of the eight injectors were starting to fail. If the problem is left unattended, it will get worse and it may cause damage to the pistons and the engine itself. I made the difficult and costly decision to replace all eight injectors.

What kind of maintenance does a Duramax do?

Heavy duty trucks, especially turbo-diesels, are costly to maintain. Yes, you can do most of the maintenance yourself: oil changes, fuel filter changes, air filter, tire rotations, etc. The Duramax V8 holds 10 quarts of oil. The extra oil and the fuel filter add cost to the equation.

Can you get an oil change on a Duramax?

Yes, you can do most of the maintenance yourself: oil changes, fuel filter changes, air filter, tire rotations, etc. The Duramax V8 holds 10 quarts of oil. The extra oil and the fuel filter add cost to the equation. Getting the oil change done at a dealership or a shop will run $100 at a minimum.

How long does it take to replace Duramax injectors?

The dealership estimates this job between 11-12 hours of labour. The injectors are underneath the engine’s valve covers. If two injectors failed, then it’s likely others will fail as well. It’s better to bite the bullet and replace all eight at once, and save of more labour costs.

Why do I need a spool up upgrade on my Duramax?

With the turbo laboring less to maintain adequate boost pressure, intake air and EGT drop, coolant temperature decreases and turbo responsiveness (spool up) improves. This one is common on all ’01-’07 trucks with four-wheel drive, but we’re calling it out here due to a lack of major issues that plagued the LBZ specifically.

Which is the best engine for a Duramax truck?

There are a ton of bolt-ons that make driving a Duramax-powered ¾-ton Chevy or GMC much more fun than operating a 7,500-pound pickup should be. Already the quickest trucks out of the box among the Big Three, it doesn’t take much to keep them at the front of the pack.

Can a vacuum line cause an engine to surge?

Learn more Step 5 – If a vacuum line has caused a leak the engine will surge, as vacuum lines age they can become brittle and fall off the engine or accessory. Learn more Step 6 – If an air intake boot becomes torn and develops a leak it will cause the engine to surge.

Thanks to a 17.5:1 compression ratio (the highest of any other engines in the Duramax lineage), extreme amounts of low-rpm cylinder pressure (i.e. torque) can be present when you’ve more than doubled the factory horsepower and torque rating.

Why does my Silverado Sierra increase in rpm?

If your left foot is barely touching the brake, it can cause this. If your truck has afm the Rpms will increase 100-200 rpm when it goes I to 4 cyl mode. They will come back down when it goes back into 8 cyl mode So maybe it is switching back and forth from 4 to 8 cyl mode. That makes sense.

What causes an engine to surge during a tune up?

Step 2 – An engine’s tune up is a regularly scheduled service, when this service is neglected it can cause the engine to surge. Learn more Step 3 – If a fuel pump or regulator is failing is can cause an unsteady volume or pressure for the fuel system causing the engine to surge. Learn more

Why is my car surging at idle speed?

When an engine’s computer can “hunt” or “surge” at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system.

When to set DTC for engine surge maintenance?

• After driving at 6.25 mph or more, the actual engine idling speed varies from the target idling speed by between 100 and 200 rpm, five times or more during a drive cycle. • If the actual idling speed varies from the target idling speed by more than 200 rpm five times or more during a drive cycle, the ECM illuminates the MIL and sets the DTC.

What causes a coolant leak in a Duramax engine?

Failure to inspect the EGR cooler for leaks may lead to a misdiagnosis for coolant entering the combustion chamber. Previously, An EGR cooler pressure tester adapter set, EN-48974, was shipped essential to dealers in December 2007 to diagnose EGR cooler engine coolant leaks on all Duramax™ engines equipped with an EGR system.

Is the Duramax block used in the LMM engine?

While the Duramax block used in the LMM is a highly capable and reliable engine, it does suffer some limitations. If you are driving a stock LMM and have no intentions of modifying it, then you can ignore this issue. I’ve never heard of the pistons cracking or the crankshaft snapping on stock engines.

How much power does a Duramax Diesel have?

Power was at an all-time high coming in at 397hp and 765 pounds of torque, and in order to provide this much power while still keeping pollutants low, GM needed to be able to increase the pressure in the fuel system to levels above what the tried-and-true CP3 could safely deliver.

Can a blown fuse cause a starter to not start?

Blown fuse – Sometimes the simplest explanation is the best one. A blown fuse in the starter circuit could be the cause of a no-start problem. Broken or corroded wiring – Damaged or dirty wires to the battery or to the starter solenoid (or wires that are loose) can prevent sufficient power from reaching the starter.

Why is my starter relay not working properly?

Intermittent issues starting the vehicle If the starter relay is working properly, it will send power to the starter every time it is engaged. However, it is possible that the starter relay will become damaged due to excessive heat, dirt, and debris or other issues that might cause sporadic operation of the starter.

Why is my Chevy GMC diesel starter not working?

In less than a month the starter has started to not work. It does the classic loud spin as the starter does NOT engage. It doesn’t do it all the time, but it is starting to happen more frequently as time goes on. I wouldn’t recommend this unless you are looking to just get by quickly and get a less expensive starter for a short amount of time.

Is the Chevy GMC diesel 6 starter good?

Love the new starter. Installed good. The old starter was a real bear to get out. There is a good YouTube video on how to use a ratchet strap to hold the exhaust pipe over to give more room. The flange on this new starter must be slightly smaller-it when in very easy. It works excellent!

What should I do if my starter doesn’t work?

Good fit, good for short term less expensive, but should buy a different one. The starter is an exact fit and bolts in nicely. It is strong enough to start the truck just fine. In less than a month the starter has started to not work. It does the classic loud spin as the starter does NOT engage.

When does the Allison transmission warm up in the summer?

These transmissions will warm up when towing or driving in the summer months. 200-225 is very common when the ambient air temp is 80-100 degrees and your transmission is under an increased load. Temperatures from 230-240 have been reached with no damage to the transmission.

What happens when the Allison 1000 goes into limp mode?

When the Allison 1000 transmission senses an abnormal amount of slip in the transmission, it enters limp mode. While in limp mode, the transmission will lock in 3rd gear, the torque converter will remain unlocked, and the transmission will not be able to operate in reverse.

Which is the best lift pump for a Duramax?

The FASS Titanium Signature Series Lift Pump is an excellent upgrade for any Duramax. When GM changed body styles with the 2008 Duramax, the redesign coincided with some new regulations from the EPA regarding emissions equipment on light duty trucks.

Is the 2020 Chevy 2500 Allison 10 speed?

Against my better judgement of not purchasing first year model of anything with major changes, I bought a new 2020 Chevy 2500 HD with Allison 10 speed about a month ago. Loving it except for the fact that 1800 miles in, the truck would not move.

Why does my Chevy 2500 Duramax not move?

Loving it except for the fact that 1800 miles in, the truck would not move. Last week I had just launched my boat after a short 2 mile pull to the ramp. Unhooked from the empty trailer back at the house and pulled forward about 20 ft before backing into the driveway.

What’s the problem with the Allison Transmission 1000?

What Might be Wrong with Your Transmission 1 Limp Mode (Allison 1000 Model) The Allison transmission 1000 model has a feature called “limp mode”, in which the… 2 Hooked Up Incorrectly It’s also possible that the transmission itself is just fine, but was installed incorrectly. If… 3 TCM Module Recall More

What causes loss of propulsion in Chevy Duramax?

Loss of propulsion is a serious deal. Dealer does need to duplicate to perform a proper diag. Could be a solenoid, TCM or wiring issue. I’d be interested to see what diag, if any, that they did. Being that is an all new transmission, I would assume that engineering would be pretty interested in it.

Why is the roller lifter on my Duramax not working?

Unfortunately, the latter scenario plays out more often than seizures do. Typically, the roller lifter (or bucket) that rides on the CP4.2’s shaft (the part that’s driven up and down via the plunger) fails due to lack of lubrication or debris hampering its ability to operate in an unobstructed manner.

Why is my car not starting after overheating?

If the thermostat is damaged, and left in place, that can set the stage for future cooling system problems. In your circumstance, you appear to have the additional problem that the car won’t start but that will be diagnosed and resolved after the mechanic restores the cooling system.

What kind of truck is 2005 Chevy Duramax?

2005 Chevy 2500HD Duramax 4X4 was deveeloped by Kelderman Manufacturing. It was the official show truck to promote the first Sprint Sound & Speed event in Nashville, Tennessee. The trucks biggest asset is the 12-inch Kelderman 1-Owner New Vehicle Trade! LT 6.6 V8 Duramax Turbo Diesel Crew Cab 4×4.

What kind of transmission does a Duramax pickup have?

Nearly all Duramax powered pickup trucks were equipped with the Allison 1000 automatic transmission, with the five-speed version running from 2001 to 2005, and the six-speed starting in 2006 and running until 2019.

Is there a 6.6 Duramax that wont start?

Chevrolet: 6.6 duramax wont start all of a sudden . Turns… I have a 2009 chevy 2500HD with the 6.6 Duramax. I started I have a 2009 chevy 2500HD with the 6.6 Duramax. I started the truck with my remote while I was opening my shed it ran for a couple of seconds … read more

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Ruth Doyle