Are there transmission problems with a 2003 GMC Sierra?

After five years, most of the issues with these trucks had been worked out. Now, these trucks are getting older, and it’s very likely that your 2003 Sierra may be having transmission problems. Below, you’ll find a ton of troubleshooting your transmission problems.

Why is my GMC Sierra 1500 blowing hot air?

When the air conditioner in your 2003 GMC Sierra 1500 starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system.

Can you add Freon to a GMC Sierra 1500?

If there is a problem with your compressor or evaporator, adding freon will not restore cooling. How to add freon to your 2003 GMC Sierra 1500: hook up the can of refrigerant (likely r-134a) to the low pressure port. When your compressor kicks on, add freon to the correct pressure.

What causes a GMC Sierra to go into limp mode?

In either first or second gear, the torque converter slips more than it normally would on a takeoff. Most of the time, limp mode is caused by loss of signal to/from the TCM. Either the wiring harness has a short or the transmission fuse is blown. It doesn’t matter whether your 2003 Sierra has a 4L60E or 4L80E, the fuse will be in the same location.

Why is my GMC Sierra 2500 HD blowing hot air?

When the air conditioner in your 2004 GMC Sierra 2500 HD starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system.

How to add Freon to a GMC Sierra 2500 HD?

How to add freon to your 2004 GMC Sierra 2500 HD: hook up the can of refrigerant (likely r-134a) to the low pressure port. When your compressor kicks on, add freon to the correct pressure. In addition to cooling, freon lubricates the compressor when it runs.

Where can I buy a 2003 GMC Sierra?

2003 Sierra 2500HD listings within 50 miles of your ZIP code. Get answers to buy with confidence. Save when you purchase multiple reports. Get free quotes from dealers near you.

Why is my GMC Sierra not moving in any gear?

It is pretty applicable to the 4L80E as well. Not Moving in any Gear – If your 2003 Sierra Transmission has a problem moving in any gear, it’s likely caused by a lack of transmission fluid. No matter how silly that sounds, and how convinced you are that it’s not the problem, go ahead and check it anyway.

How can I tell what kind of transmission I have in my GMC Sierra?

First and foremost, it’s necessary to determine what kind of transmission is in the truck. The easiest and quickest way to go about determining this is by RPO codes. The RPO codes are a list of production options that are printed u p and stuck in your trucks inner glove compartment when it’s produced.

What are the symptoms of a GMC transmission problem?

GMC vehicles with 8-speed 8L90 and 8L45 transmission have a widespread problem known as ‘Chevy shudder.’ The symptoms that may happen during gear shifts and typically include shaking, juddering, and harsh shifting. In severe conditions, it may be followed by a noticeable clunk.

What’s the problem with my Chevy Silverado transmission?

I was told by chevrolet it is caused by a tall second gear and is normal and will not do any harm to the tranny. Has anyone else out there had this problem with their silverado’s transmission and had it fixed.

What causes a GMC transmission to overheat?

Overheating – Overheating of transmission fluid is another common problem that can lead to harsh shifting issues and premature failure of a GMC transmsion. Overheating is a concern on GMC trucks that are used for towing or hauling heavy loads frequently.

Why is the transmission not shifting on my Chevy Silverado?

Take a couple of easy steps to see why your truck is not shifting. No need to panic yet. This article applies to the Chevrolet Silverado GMT800 (1999-2006). Your transmission is just supposed to shift and leave you alone.

Is the GMC Duramax Trans won’t shift?

Enter your ride HERE to be a part of this months Ride of the Month Challenge! Alright guys I’ve got an 04.5 LLY and after sitting for 2 or 3 days went to drive it and it clunks real hard into reverse and drive.

What to do when automatic transmission won’t shift into 3rd gear?

Check the Throttle Cables. Changing the fluid solves plenty of transmission issues but if the problem of automatic transmission won’t shift into 3rd gear persists, the parts you should check are the throttle cables. A defective cable with excessive slack is likely to create issues with smooth shifting of the gears.

Can a Chevy Silverado go from 1st to 4th shift?

Transmission is in Limp Home Mode or has no electrical power. Also, PCM has lots of error codes. No 1st or 4th, shift 2nd to 3rd by itself when put in D or OD and locks converter: Goes into gear but sluggish like brakes are on, can manually shift to 2nd to get moving, then put in OD and truck shift 3rd as well as 4th are OK.

Why does my Chevy Silverado have transmission problems?

It may be (but is less likely) that the sun shell went bad as well. If your 2003 Silverado Transmission has a problem moving in any gear, it’s likely caused by a lack of transmission fluid. No matter how silly that sounds, and how convinced you are that it’s not the problem, go ahead and check it anyway. You should want this to be the problem.

What kind of transmission does a 2003 Chevy Silverado have?

MG5 – This is the NV3500 manual transmission. It’s the only manual available for the 2003 Silverado. M30 – This is the 4L60E automatic transmission. It came in the lighter duty trucks. It’s a four speed overdrive transmission. MT1 – This is the 4L80E automatic transmission. It was used in HD applications.

What causes transmission problems on Dodge Ram 1500?

Here is a comprehensive guide on problems you might experience with the dodge ram 1500: 01. No heat One of the leading causes for Dodge Ram transmission problems can be a heat a problem. But why is it? If the coolant has some dirt residue—all the dirt will eventually stop the flow of the coolant.

Why does my 2003 Chevy Silverado have transmission problems?

Why does my GMC Sierra 1500 not shift gears?

GMC Sierra 1500 Questions – Speedometer doesn’t work and transmission doesn’t shift gears. – CarGurus Speedometer doesn’t work and transmission doesn’t shift gears. The speedometer stays at 0 all the time. When the transmission is in drive it won’t come out of 1st gear.

Why does my speedometer not work on my GMC Sierra 1500?

– CarGurus Speedometer doesn’t work and transmission doesn’t shift gears. The speedometer stays at 0 all the time. When the transmission is in drive it won’t come out of 1st gear. Reverse works fine, and if I manually put the transmission in 1st or 2nd it works fine.

Why is my Trans bad on my 4L60E?

Trans seems noisy when moving in 1st and Reverse, noise goes away instantly if you shift to N or the transmission goes into 3rd gear: Reaction planetary is worn out due to high miles or insufficient lubrication. Not a critical failure, but not a good sign either.

How to tell which transmission I have GMC Sierra?

New to the forum here. I recently purchased a 2008 GMC Sierra 1500 CC Z71 4wd. I want to change the transmission filter but I don’t know which 4 speed transmission I have.

What kind of transmission does a GMC Geo have?

Chevrolet/GMC/Geo Model Years Transmission Type Engine Type/Size Transmission Model Astro 1989-1992 TH700-R4/4L60 ASTRO/SAFARI 1995-2003 4 SP RWD/AWD V6 4.3L 4L60E AVALANCHE 2/3/2004 4 SP RWD/4X4 V8 5.3L 4L60E AVALANCHE 2/3/2004 4 SP RWD/4X4 V8 8.1L 4L80E

New to the forum here. I recently purchased a 2008 GMC Sierra 1500 CC Z71 4wd. I want to change the transmission filter but I don’t know which 4 speed transmission I have.

What kind of truck is the GMC Sierra?

GMC and Chevrolet also offer heavy-duty versions of these trucks called the Sierra HD and Silverado HD. The Sierra and Silverado were redesigned for the 1999 model year and come in half-ton 1500 models and light-duty three-quarter-ton 2500 models, competing against the Ford F-150.

What kind of transmission does a 2003 GMC Sierra have?

The transmission options that were available to the 2003 Sierra were as follows: MG5 – This is the NV3500 manual transmission. It’s the only manual available for the 2003 Sierra. M30 – This is the 4L60E automatic transmission. It came in the lighter duty trucks. It’s a four speed overdrive transmission.

Are there any recalls on the 2003 GMC Sierra?

2003 GMC Sierra Transmission Recalls There have been no recalls on any of the transmissions that come equipped in the 2003 GMC Sierra. For a complete list of recalls, check this list out from cars.com.

Why is my GMC Sierra only getting 3rd gear?

Another thing is, if you keep it in drive you’re only getting 3rd gear, but if you manually shift it into 2nd gear, it’ll go there. That makes taking off much better on the transmission. In either first or second gear, the torque converter slips more than it normally would on a takeoff.

Why does my GMC Sierra not lock in overdrive?

Transmission Not Locking in Overdrive – The 4L60E and 4L80E both have torque converters that lock. That is to say when they are moving at a certain speed, they’ll lock and create a direct 1:1 connection between the engine and transmission. It removes all of the torque converters multiplication factor and increases drivetrain efficiency.

What kind of transmission does a GM 2500HD have?

This worked out great. Despite the confusing name, this is the 4×4 extension housing for the Allison 1000 automatic transmission found behind the Duramax Diesel and the 8.1L gas engines in the 2001 and newer 2500HD and 3500 GM pickups. It comes with the needle bearing, but not the 6209 (open) output bearing.

Are there problems with 2001-2002 Allison transmissions?

Enter your ride HERE to be a part of this months Ride of the Month Challenge! I’m looking at a 2002 model with about 42k miles. It looks to be in great shape. My mechanic (who owns the same vehicle in an 03) told me that the 01-02 Allison’s are “notorious” for having problems.

What kind of transmission does a Silverado have?

Duramax cracked housing allison 1000 Silverado. exact fit !! This worked out great. Despite the confusing name, this is the 4×4 extension housing for the Allison 1000 automatic transmission found behind the Duramax Diesel and the 8.1L gas engines in the 2001 and newer 2500HD and 3500 GM pickups.

When did the GMC Sierra 2500HD come out?

1st owner purchased on 04/30/03 and owned in CA until 12/23/10 • 2nd owner purchased on 12/23/10 and owned in CA until 02/22/11 • 3rd owner purchased on 05/10/11 and owned in CA until .

Are there any problems with the GMC automatic transmission?

Overheating is a concern on GMC trucks that are used for towing or hauling heavy loads frequently. GMC vehicles that use a 4-speed automatic 4L60E or 4L65E transmission can develop a problem with gear shifts. This issue will manifest itself as improper gear changes that take too long to happen.

How many miles does a GMC Sierra 2500HD drive?

1st owner drove an estimated 28,533 miles/year • 2nd owner drove an estimated 0 miles/year • 3rd owner drove an estimated 4,212 miles/year.

How big is a 2003 GMC Sierra truck?

2003 GMC Sierra 1500 The 2003 GMC Sierra 1500 is a full-size pickup truck that is available in a range of cabs; from seating for three up to seating for six passengers.

What to do if your GMC Sierra has no overdrive?

AutoZone, or any other parts store will be able to help you with this for free. It really is worth noting that there doesn’t need to be a trouble code thrown for there to be a code in the computer. No 1st and No Overdrive – When the truck has no overdrive and no first gear it’s almost certainly in limp mode.

What causes a traction control switch to stop working?

This is commonly caused by a traction control switch that is jammed with debris or has broken and won’t depress. In this case, the mechanic will have to replace the traction control switch, which is a rather simple process.

What happens when a car hub fails to release?

For the same reasons that prevent the hub from engaging, a hub may also fail to release. Anything that binds the internal mechanism can prevent it from sliding and releasing. The most noticeable symptoms may be an increase in fuel consumption, noise on the highway and/or increased front-tire wear.

How to keep my truck from overheating when towing?

The fan always pulls the coolant temps down but the intake air temps keep slowly rising. I have tried everything suggested and more. I am installing a auxiliary cooler and be done with it. At high loads, the radiator isn’t big enough and there isn’t enough room to install a bigger radiator.

What should I do if my Silverado truck is overheating?

Fill the radiator with coolant and allow the truck to run for 20 minutes. This will determine if the coolant level is low, causing the truck to overheat. Use extreme caution when working with the coolant system. The coolant is very hot and builds pressure which could be hazardous.

What kind of truck overheats with no load?

On my truck the transmission overheats when driving with no load on rather mild days (75 degrees F). My truck is a 2006 2500hd 6.0l 4×4 and I have an extra trans cooler in addition to the factory auxiliary cooler.

What happens if you run your truck too hot?

Coolant system failure can eventually cause major engine damage as running the truck hot can lead to head gasket failure or loss of power eventually causing the motor to stop running. Troubleshooting your coolant system, when the problems are minor, will save you time and money in the long run. Allow the truck 30 minutes to cool down.

Is there a problem with the ignition on my GMC Sierra?

This problem occurs in minivans, cars and SUVs as well. There has been more reports of ignition Anti Theft defects and the security light flashing in more cars and trucks. This is one of the easy fixes for the common ignition starting problem, but GM needs to recall this issue and fix it for us.

What kind of transmission does a Silverado 1500 have?

When diagnosing a shudder vibration condition on some 2016-2018 Silverado, Sierra; 2016-2020 Tahoe, Suburban, Yukon; 2019-2020 Silverado 1500 and Sierra 1500 models equipped with 5.3L V8 engine (RPO L82, L83, L84) and 6L80 6-speed transmission (RPO MYC), it’s critical to determine the source of the vibration in order to make the proper repairs.

What causes the timing chain on a car to go out?

Over a period of time, the timing chain can stretch, which can cause the chain to skip a gear on the cam or crankshaft. This causes the engine’s timing to fall out of calibration and often results in a misfire. The engine may also run poorly and lack accelerating power.

How to identify Chevrolet GMC manual transmissions [ video ]?

After locating correct unit a link is supplied to provide detailed information on specific kit and parts that are available for your unit. Information is provided for General Motors 3 speed, 4 speed , 5 speed and 6 speeds manual transmissions. Cast iron case and extension housing with 4-bolt side cover.

What kind of transmission does a GMC 3 speed have?

This is the only GM 3 speed with the same bearing front and rear. This transmission is found in performance applications. Cast iron, top-loaded case with side shift linkage. Fully synchronized with 36 tooth synchro rings. Same unit as Ford RAT except for a GM bolt pattern to the bell housing.

How to troubleshoot a 5-speed transmission problem?

However, this can be abused if you are not a skilled driver. Over time, abusing the transmission by shifting too hard or by grinding gears (by not fully disengaging the clutch prior to shifting) can damage the transmission. Before taking it to a shop, troubleshoot your 5-speed transmission using these tips. Check for knocking noises at low speeds.

When did the GMC Sierra gauges stop working?

Claims with repair orders prior to September 28, 2007, must be submitted to the Service Contract provider. All gauges stopped working on Friday but came back on after going through checking all lights etc. After turning right signal light on ( while driving) the gauges came on. All gauges went again today and…

When did the GMC Denali pickup truck come out?

The engine produced 320 hp upon its introduction, then was upgraded to 325 hp in 2003. 2001 also introduced a new upgraded interior and new options such as 20-inch wheels. The previous (for 2001 only) C3 model of the GMC Sierra pickup truck was renamed Denali in late 2001 as a 2002 model.

What kind of engine does a Sierra Denalis have?

For 2005 to 2007, “Classic body style” Sierra Denalis were equipped with a 6.0L 345 HP V8. Additionally the trucks from 2005 to 2007 (2007 being classic body style) were changed to a crew cab with a 5’8″ bed and did not have Quadrasteer as the 2001-2004 Sierra Denalis had.

What was the first year of the GMC Denali?

2002 marks the first year of the “Denali” designation. GMC wanted the Denali to be more than just a spruced up Sierra – it had to be mechanically superior as well 4 wheel steering (4WS) was made popular in the 90s by many Japanese sports cars, but it wasn’t as effective at improving handling as many had hoped.

How does the Quadrasteer work on a GMC Sierra Denali?

Quadrasteer works by swinging the rear tires in varying degrees based on a driver-selected mode: either two-wheel steer, four-wheel steer, or four-wheel-steer tow. Under 7 mph (parking lot speeds), the rear wheels turn at their maximum (12 degrees) in the opposite direction of the front wheels.

2003 Sierra 2500HD listings within 50 miles of your ZIP code. Get answers to buy with confidence. Save when you purchase multiple reports. Get free quotes from dealers near you.

Are there any issues with the GMC Sierra 2500?

It has been reliable with only a few issues as it began to age. It made me realize some small preferences for the next vehicle, such as: having crew cab with four doors instead of the extended cab. The main issues encountered were: antilock brakes, window motor failure, signal lights always blown, and easily broken center console.

When did the GMC Sierra have the most problems?

The model years with the most problems reported were 2004 and 2007, with more than 60 complaints each year, followed by 2002, 2003, 2005, and 2010, with more than 40 each year. Of the 112 problems, five different complaints have been reported 90 or more times.

Why is my AC not working on my GMC Sierra 1500?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my GMC Sierra 1500 has air conditioning problems?

Are there any problems with the GMC Sierra 1500?

Check out our GMC Sierra 1500 overview to see the most problematic years, worst problems and most recently reported complaints with the Sierra 1500.

What kind of noise does a 2005 GMC Sierra make?

BTW, there is a TSB out addressing this and it does state what I’ve typed above. 2005 Sierra – same noise – nobody knows what it is. Actually, the engineers at GM have determined that there is nothing they can do about it because the upper management told them to STFU.

Check out our GMC Sierra 1500 overview to see the most problematic years, worst problems and most recently reported complaints with the Sierra 1500.

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.

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.

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.

When did my GMC Sierra air conditioner stop working?

I had a 2001 GMC Sierra that did this when truck was less the one year old (summer of 2001 is when it was). The dealer had the truck in the shop idling for a long time and the A/C worked perfectly. I told them to take it for a ride and see. So the service manager in an effort to convince me nothing was wrong went for a ride with me driving.

Why does my GM car say no start no crank?

How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that.

Can a car shift gears without a downshift solenoid?

Downshift solenoids are an important transmission component, and without them, the vehicle will not be able to shift gears properly, sometimes even to the point of rendering the car undriveable.

Why does my Chevy Silverado shift from 2nd to 3rd gear?

No 1st or 4th gear, and transmission shifts from 2nd to 3rd by itself: The shift solenoid has failed, or there is a wiring problem between PCM and transmission. Replace the shift solenoid located in transmission pan, or check wiring continuity.

Why is my Shift Solenoid not working on my Chevy Silverado?

The shift solenoid has failed, or there is a wiring problem between PCM and transmission. Replace the shift solenoid located in transmission pan, or check wiring continuity. Shift solenoid B failed, or there is a wiring problem between PCM and transmission. No Drive in OD or D, but L2, L1 and R work: The forward sprag is broken.

Why is the transmission slipping on my Chevy Silverado?

The sunshell is damaged. The transmission needs to be replaced or repaired. The 2-4 band is slipping, or servo seals are leaking. Servo seals can be replaced without pulling transmission, or the transmission must be removed for band replacement. No 1st or 4th gear, and transmission shifts from 2nd to 3rd by itself:

When does my Tahoe shift to 4WD by itself?

At random times my Tahoe will shift into 4wd hi or lo by itself. It happens while driving, or when i first start the vehicle. It takes 20 min of button pushing to get back to 2hi. Clicking this will make more experts see the question and we will remind you when it gets answered.

What kind of switch is on Silverado 1500 Crew Cab?

I am hoping someone here can help me out. I have an 04 silverado 1500 crew cab 4wd. The truck has auto 4wd, 2wd, 4wd hi, 4wd low switch. I always keep the truck in 2wd unless needed other wise but I have noticed on more then one occasion now that my switch will automatically engage into auto 4wd from 2wd.

What kind of car is a 2003 GMC Sierra 1500?

Description: Used 2003 GMC Sierra 1500 SLE with AWD/4WD, 8000lb Towing Capacity, Audio and cruise controls on steering wheel, Auto Climate Control, 6ft Bed. Good Deal! Accident History: This vehicle has 1 reported accident. Number of Previous Owners: This vehicle has 2 reported owners. Usage Type: This vehicle was used by an individual.

Why does my 2003 Chevy Silverado not start?

My 2003 Silverado has issues starting sometimes. If I hit the steering column it will sometimes start. My silverado has left me stranded numerous times with this intermittent starting bullsh!t. The truck starts majority of the time however sometimes I go to start the engine and nothing!!

What kind of engine does a 2003 Silverado have?

Here’s the kicker…..I put the new one in and the truck started right up and we thought it was fixed, my son drove the truck and it ran fine, but when he returned home, it wouldn’t keep running after he would try to start it again, no matter how many times we tried.

How to tell if your GMC Sierra has a bad starter?

1 Noises Your ears are the best diagnostic tool that you have. You can tell a lot about what’s going on with a vehicle by carefully listening for changes. 2 Won’t Start If your Sierra won’t start that can be a very strong indication of a bad starter. The thing is, it can also indicate other problems as well. 3 Smoke

Are there transmission problems with a 2003 GMC Sierra?