Why does my Chevy Blazer not 4 wheel drive?

I Have A 2001 Chevy Blazer The 4×4 will not engage. I Press the 4×4 Auto, Hi or Low button on the dash they just keep flashing. you can here the transfer case engage, but It will not be in 4 wheel drive. I have tried driving around with the light flashing to see if it would engage it did not. please help me find out what this is.

Is the 4 wheel drive light on on my Trailblazer?

2002-2005 Chevrolet TrailBlazer, TrailBlazer EXT 2002-2005 GMC Envoy, Envoy XL 2004-2005 GMC Envoy XUV 2002-2004 Oldsmobile Bravada with Four-Wheel Drive (4WD) Condition Some customers may comment that the Service 4WD light is on, the 4WD system is inoperative or the 4WD switch indicator lights are blinking. Service Diagnosis

What to do if your Chevy Trailblazer does not engage?

Make sure the tab (1) on the encoder mates with the notch (2) on the shaft. If the encoder tab is not aligned with the output shaft, rotate the encoder inner ring by hand to mate properly. Press the encoder fully onto the shaft and into the housing. Important:

Why does my Trailblazer 4WD make a noise?

There are two actuators that activate the 4WD components, one is for the Transfer case modes and the other is for the front axle disconnect. Both of these actuators make a distinctive noise (motor noise) when activated.

Why does my 4 wheel drive not engage?

The transfer case could pose another reason why your 4 wheel drive fails to engage. This could be due to the vehicle not coming to a complete stop to allow it to engage. This is because the splined pin and gears of the actuator need to align 100% with the gears inside the transfer case.

Why does my GMC 4×4 won’t engage?

Not using 4wd is ne of the biggest causes of failure ! Take it to a mechanic. Everything’s a guess from here on out. @dagosa The new style transfer case’s like what in my 06 GMC, are not like the old style that you need to use once in a while. The new ones (been this way since the late 90’s) are shifted with motor on side of transfer case.

Why is my 4×4 wd not working properly?

Heck, it could be anything from mechanical to a loose or corroded connection. But it will have to be evaluated on a lift. Also, use your 4 wd monthly all year long, even if you don’t need to, for at least 10 to 20 minutes. Lubrication is essential for longevity of these units and many fail for lack of use then you can believe.

Why does my 4WD not engage at regular intervals?

Though systems vary, I would be hard pressed to find one that did not recomend you engage the 4wd at regular intervals. Toyotas are 10 miles per month. Problems with shift modules and wiring may be problems associated with GMCs. It depends on the make. OP is in trouble, because he didn’t catch it in good weather.

Why is my Chevy Blazer not doing 4WD?

While there are other possible reasons why a 4WD system would not engage such as the transfer case encoder motor and computer, the possible reasons I’ve pointed out in this video are quite common and easiest to diagnose. The 4wd vacuum actuator is one of the easiest ways to determine where the problem is on your vehicle.

Can a Chevy Silverado have a slipping 4WD system?

So if your Chevy Silverado is showing symptoms of a slipping 4WD system, continue reading for common diagnoses and repairs. This article applies to the Chevrolet Silverado GMT800 (1999-2006). 4WD systems give truck owners unprecedented abilities when it comes to gaining traction, both on and off the road.

Why does the 4 wheel drive light stop flashing?

The transfer case neutral position needs to be selected before you attempt to engage 4WD. The selected position indicator light will flash until the transfer case completes the shift. When the shift is complete, the indicator light for the selected position will stop flashing and remain ON.

Where are the vacuum hoses on my Blazer?

Also check all the vacuum hoses from the actuator (under the battery tray) to the vacuum switch (middle of firewall) back to the vacuum reservoir (inside left fender?). When my Blazer was around 10 years old, the hose ends were showing signs of deterioration.

When to replace shift solenoids in GM 4L60-E?

TIP 4: If your transmission is slipping, replacing the shift solenoids, even if they’re fried will not solve the slipping issue. The 4L60-E transmissions uses several solenoids and sensors to control/activate its 4 gears.

Why does my Chevy Trailblazer make a grinding noise?

Check out gm-trucks.com. How can I fix grinding noise in the awd. Sounds like bearings grinding. Got a 2004 trail baller and I switched to awd while moving and it never went into gear and now it grind’s all the time.

What causes a Chevy transmission to not shift?

Low transmission fluid level. Chevy transmission won’t shift, stuck in 1st gear or limp mode – Speedometer may also display zero at all times. It could be internal transmission failure, low transmission fluid, or faulty Vehicle Speed Sensor (VSS sensor).

What is the shifting solenoid on a Chevy S10?

The shifting solenoid on a Chevrolet S-10 pick-up is designed to regulate when the transmission shifts. This solenoid is part of the electronic transmission control system, and is controlled by the powertrain control module, or PCM. The PCM actuates the shifting solenoid when it determines that an upshift or downshift is required.

How can I fix a Chevy transmission problem?

Locate the diagnostic port under the dashboard (driver’s side) and plug in your scanner. Turn on the ignition and your scanner. Select Chevy from the main menu, then select your model. Select Control Units, then select Automatic Transmission. All codes that show as CURRENT should be fixed.

What happens when you push the 4 Hi button on a Chevy Blazer?

When you push the 4-Hi button, it shouldn’t always flash. Usually, it will just switch right over in a second or two. If you do it with the key on, engine off, you should hear the transfer case actuator move under the truck. This usually isn’t a problem.

Why is the 4HI switch not flashing on my Chevy Blazer?

When I switch from 2h to 4hi the switch does not flash. Is this normal? Also as I read the manual to do this, it states that in neutral, press and release the 4HI switch, and the indicator remains illuminated (not flashing) before shifting in gear (drive) I believe. The light just stays on, not flashing.

Why does my Chevy Blazer Bang under load?

Sounds like the actuator isn’t completely pulling the transfer case all the out of 4wheel drive and under load, It’s popping out. Hence, the bang. This would also explain both hi and lo lights on at the same time.

Why does my 4WD light come on on my Chevy Silverado?

There is a common problem with 1999-2001 Chevrolet Silverado where the service 4wd light comes on in the vehicle. The light is scary and led me to believe there were major issues with my four wheel drive, but it turns out its a quick, cheap, and painless fix by swapping out the 4wd selector switch.

What is the 4 wheel drive switch on a 2000 Chevy Silverado?

Turn the switch over and look for the part number on the back. Mine is a 2000 Silverado Z-71 Extended Cab. The part number is the longer of the two – 15709327. I believe they used this part for 1999, 2000, and 2001. You can purchase the part, APDTY 012173 4×4, Four Wheel Drive 4WD Transfer Case Selector Button Switch.

What’s the best way to clean a 97 to 05 Blazer?

15 people found this helpful. If 97 to 05 blazer shifts into 4lo but not 4hi climb under with gunk carb cleaner, spray the shit out of it, scrub transfer case motor and linkage with tooth brush and spray it again. Works every time

How do you troubleshoot a Chevy 4 wheel drive?

How to Troubleshoot a Chevy Four-Wheel Drive. Chevy uses an electronic control to transfer the power from two-wheel drive to four-wheel drive. It’s no longer necessary to exit the vehicle and manually lock the hubs on the front wheels. This 4×4 system is operated with a transfer case knob on the dash board.

What kind of Fuse do I need for my 2000 Blazer?

My 2000 Blazer works in all drives as long as i have 15 amp fuse it the slot , it (calls for 10 amp .) been all over the truck looking for bear wires an shorts , can’t find any , Any ideas? 29 people found this helpful. It will go into 4w when u push the 4w low, but when u push the 4w high button it goes back to 2w

Why is my Chevrolet S10 4×4 not working?

(Diagnose and Fix) – YouTube Chevrolet S10 4×4 Not Working? (Diagnose and Fix) If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.

Is there an amp in the back of my Blazer?

Well, just before this starting happening, my son and I installed a sub and amp in the back of the Blazer.

Is there a problem with my Chevy Blazer 4×4?

Yes my name is kyle and I have a 1999 chevy blazer 4×4 and i have the same tccm problems like everybody else but my only problem is that i need the new 32 pin femal plug and the 4pin female cause my tccm is in working condition. I can’t find then plugs and wires anyplace i know what are odds there.

Why is my Blazer still picking up speed?

2) The Blazer still picks up speed and drives well except for the rubbing/vibration now. Would having pulled out and put back in the dash switches or being in such close proximity to the TCCM caused issues?

What does it mean when front differential won’t engage?

On the front, there is an actuator that engages the front differential to the front drive shafts. It may not be engaging if the transfer case does. It is easy to check which is at fault by a mechanic with the truck on a lift.

Why does my 4×4 won’t engage Please Help?

If they then work, it may just be this and using a synthetic may help in cold weather. Don’t count on it, but give it a try. Heck, it could be anything from mechanical to a loose or corroded connection. But it will have to be evaluated on a lift. Also, use your 4 wd monthly all year long, even if you don’t need to, for at least 10 to 20 minutes.

Why does my blazer have a bad bearing?

OK; got the Blazer back from the shop. You were RIGHT ON when you said that it was coincidental with having installed an amp. As an FYI for you and your readers: They diagnosed the problem as a bad bearing (driver side, front).

Is the 4×4 light on on my Blazer?

I read what you said about the wires on the Blazer, but mine were not corroded. I took it off and cleaned it up anyway and it came back on, but as soon as I turned the key off she was gone again. I don’t have any lights lighting up on the 4×4 switches. Service 4X4 light is on in the dash. I don’t know what is going on.

Is the 4Lo button on a blazer working?

I also now notice (in testing it) that the Auto 4WD, 2HI, and 4HI buttons work, but that the 4LO button just blinks when pushed (in neutral). I have to push one of the other buttons to get out of it.

What are the symptoms of a bad front axle engagement switch?

Another symptom of a potential problem with the front axle engagement switch is a four-wheel drive system that becomes stuck. A bad switch may cause the four-wheel drive system to be stuck in the permanently engaged, or disengaged mode.

How can I tell if my front axle is working or not?

Front axle will not engage, I can hear the Transfer Case switching when I turn the knob to 4wd but the front axle is not working. Can anyone tell me what wire is what on the 4 wire plug, and what I should be seeing when.or have a pin out so I can jump power to the actuator on the axle to see if that works?

Why does my Chevy k1500 4WD not engage?

As far as i know just replacing the axle shouldnt effect if it goes in 4×4. If it will not even go into low range sounds like a transfer case problem to me.

Why is the 4 wheel drive light blinking?

The 4-Lo engaged the low-range transfer case for rough and challenging off-road driving. Fast forward a few decades and, enter the Actuator. The actuator is a component found mostly on modern four wheel drives and is designed to electronically engage 4 wheel drive.

How does a 4 wheel drive light work?

It accomplishes this by means of a small electric motor bolted onto the transfer case that shifts a pin in place to lock the center transfer differential. The actuator allows you to shift from 2WD to 4WD on the fly and back to 2WD without stopping and can be engaged and disengaged by means of a switch inside the cabin, usually on the dashboard.

When does the selected position indicator light stop flashing?

The selected position indicator light will flash until the transfer case completes the shift. When the shift is complete, the indicator light for the selected position will stop flashing and remain ON. If any of the shift conditions are not met, the indicator position light will continue to flash. You cannot be in gear for it to work.

Why is my 4 wheel drive Chevy Trailblazer not working?

My husband was driving our 2005 Chevy Trailblazer, and when he went to change the switch into four-wheel drive, the switch wouldn’t budge. Instead, it broke off–through no fault of my husband I’m told–and the 4×4 service light popped on.

When to replace the vacuum actuator on a blazer?

The vacuum lines should be completely flushed on this vehicle and there is likely a bad seal between the transmission and the transfer case. The vacuum actuator may need to be replaced in the future also due to the amount of transmission fluid in the actuator itself.

Why is my Chevy Trailblazer not engaging 4HI blinking?

First thing to do is with engine off and ignition on, switch from 2HI to 4HI and listen for two distinctive noises. If you hear both, more than likely the front spline disconnect assembly (at the front axle) is defective. In order to troubleshoot the 4WD system, you need to have an understanding of the whole thing, it is not a DIY item.

Can a push button 4×4 engage on a 2002 S10?

I have a 2002 4.3 s-10 with push button 4×4. When i select 4 high or 4 low the transfer case will engage and turn the front driveshaft but the front axle will not engage. I jacked up all four tires and tried this.

Why does my S10 transfer case not engage?

When it’s open, vacuum will be supplied to the actuator and the cable will be pulled. The cables sometimes do get frozen up – 3/8 inch of movement seems like not enough. If there’s vacuum always on the 4×4 actuator, there’s something wrong with your transfer case vacuum switch.

Why is MY 1993 Blazer not shifting into 4 wheel drive?

On 1993-1994 s10 Blazers etc, the tccm (transfer case control module) looses ground. This causes it to work some of the time , or not at all. Ground black wires at tccm 10c, 12d,13d (the black wires) also you need a good neutral s/w , as it also completes the ground to engage Low range. tccm extreme R behind dash,

What kind of truck is a Chevy Blazer?

Current Project Vehicles. 2000 Chevy Blazer ZR2 – 4wd 2 door lifted from the factory. 2001 GMC Sonoma pickup truck with a fisher Homesteader Plow. 2016 Chevy Silverado 1500 Double cab Z71 Midnight Edition.

What causes a car to not go into 4 Hi?

P0010 can be caused by inadequate oil delivery due to engine oil sludge (the VVT system relies on hydraulic pressure), worn timing components (chains, gears, guides), malfunctions in the crankshaft or camshaft position sensors, and wiring faults. The possibility of… Car won’t pass state inspection due to emissions problem..

Why is my 1973 Chevy Blazer not running?

I have a 1973 k5 blazer and has the same issues starts and runs great in park but when in gear it acts like it’s starving for air. It backfires through the exhaust and carb, doesn’t want to shift on its own, and it doesn’t go over 40 mph. Would this be a vacuum leak or bad vacuum modulator?

What should I do if my 4×4 won’t engage?

First, so you are sure it will work when needed, and secondly, to keep everything lubed. Regardless of the make and year, as they age they should be check when you don’t need them so they work when you do. Not using 4wd is ne of the biggest causes of failure ! Take it to a mechanic. Everything’s a guess from here on out.

Well, just before this starting happening, my son and I installed a sub and amp in the back of the Blazer.

What are the lights on a 4 wheel drive Chevy?

The lights will correspond to the “2” and up-arrow position for two-wheel-drive high, “4” and down-arrow for four-wheel drive low, and so on. Wait for flashing lights to stop before shifting the knob. Don’t shift the knob too frequently if the transfer case enters shift protection mode.

How does a four wheel drive Chevy work?

by Patrick Nelson. Chevy uses an electronic control to transfer the power from two-wheel drive to four-wheel drive. It’s no longer necessary to exit the vehicle and manually lock the hubs on the front wheels.

How can I get my Trailblazer to 4WD?

Put the transmission shifter in neutral. Then, try and shift into 4WD low. The transfer case won’t go into 4 low unless the transmission is in neutral. helpful? I’ve done that – I have 71K miles on it – bought it new – never had a problem getting into 4×4 low – it tries, light blinks, but never shifts.

What kind of 4 wheel drive is not responding?

4 Wheel Drive Is Not Responding: I Have a 02 Trailblazer with 4 I have a 02 trailblazer with 4 wheel drive problems granted it frustrating me.

Where is the 15 Amp Fuse on my Trailblazer?

According to the schematic, there is a 15 amp fuse in the rear fuse block below the left rear seat. Did you check that? Also, under the hood at the fuse block, there is a black / white wire which is a ground. Check to see if it is in good condition. I have attached a schematic.

What are the problems with a 2001 Chevy Blazer?

Worst 2001 Chevrolet Blazer Problems #1: Faulty Transmission 2001 Blazer Average Cost to Fix: $3,000 #2: No Fuel To The Engine 2001 Blazer Average Cost to Fix: $700 #3: Coolant Leak 2001 Blazer Average Cost to Fix: $2,500

Are there any problems with the 1998 Chevy Blazer?

Check out our Chevrolet Blazer overview to see the most problematic years, worst problems and most recently reported complaints with the Blazer.

Is the Chevy Blazer a 4 wheel drive car?

The Chevy Blazer lost its 4×4 capabilities with its redesign and only paired all-wheel-drive capabilities with the V6 engine option. That means the standard engine doesn’t come with an AWD option. To gain the AWD feature, you will have to spend a little more for a higher trim option.

Why are there no lights on my 4×4?

I had the same issue with my zr2 today… so it turns out that is for some reason the 4×4 switch is powered by the interior lights. The drivers door open sensor was broken out of the dash below the fuse panel and I pulled the broken assembly out and got interior lights… and the lights on my 4×4 selector came on for a minute and went back off.

Why are there no lights on my GMC Jimmy?

The drivers door open sensor was broken out of the dash below the fuse panel and I pulled the broken assembly out and got interior lights… and the lights on my 4×4 selector came on for a minute and went back off. The other problem I was having was the plastic tab on the back wasn’t holding the wire securely to the 4×4 switch.

How to check your 4WD system operation 98up Blazers?

Check all vacuum hoses from the intake to the drivers side reservoir can, then to the extra switch (99up) and down to the under battery actuator. Small hose is 5/32 and larger is 7/32”. 2. See if the actuator pulls the front axle cable to engage it. If not and all hoses are good the diaphragm may be leaking on the actuator.

How does the 4WD system work in a Blazers?

If you want 4 Lo the TCCM commands the encoder motor on the transfer case to switch a lower gear in (requires putting the shifter in Neutral and be stopped or only going 2-3mph). Note that if 4 Hi selected no action done in the transfer case.

What is the actuator on a 4 wheel drive?

The actuator is a component found mostly on modern four wheel drives and is designed to electronically engage 4 wheel drive. It accomplishes this by means of a small electric motor bolted onto the transfer case that shifts a pin in place to lock the center transfer differential.

What does the blinking 4 wheel drive indicator mean?

So what is that 4 wheel drive indicator blinking on your dashboard means? The purpose of the 4 wheel drive light is to indicate when you have engaged 4WD mode by selecting 4H. When the light flashes continuously for more than 30 seconds it signifies there is a problem somewhere on your drivetrain system and that 4WD has not engaged properly.

Why are there no lights on the selector switch?

I know this is an old thread but still very informational. On a 99 silverado 5.3 the switch lights would not come on also it was stuck in 2wd.l I replaced the actuator on the transfer case, checked the 4wd fuse in the cab, replaced the switch and the TCCM. Still no lights and no 4wd.

What is the engine code on a Chevy Blazer?

Initially the code was p0171. Now that we cleared it it hasn’t come back on. Pulled O2 sensor to relieve back pressure and there was no change. Cleaned connections on battery. On scanner TPS checks good ( 0-100%).

When does a 2001 Blazer start to bog down?

I have a 2001 Blazer, last week as I was climbing a hill I attempted to accelerate and heard a “pop” and my engine started to bog down. Over this last week the bogging down has got progressively worse but only happens when you attempt to accelerate.

Why does my Chevy Blazer engine bog down when I hit the gas?

Take it to a good local mechanic (not a dealer) and see if this is one problem. My Blazer bogs down when you hit the gas and has trouble starting. We have replaced the MAF sensor, plugs, rotor, cap, plug wires, and fuel filter. The fuel pressure is at 50psi when idling and 64 wot when driving.

What was the problem with my 1991 Chevy 4WD?

1991 Chevy 4wd problem | The largest community for snow plowing and ice management professionals. Find discussions on weather, plowing equipment and tips for growing your business. While continiuing to go through and get all the trucks ready I discovered a problem.

Is there a problem with my Chevy 4WD?

-to eliminate the trans case as a problem, you can disengage it like normal (trans case in neutral, transmission in drive and nothing moves-working properly.) when I engage 4 low, only the rear tires again are powered. -I did drain and refill the the front diff as part of the pre-season maint.

Why is my 4 wheel drive light not engaging?

If you don’t shift it into neutral, the 4wd light will continue to flash and won’t get into gear. Seems to be a common occurrence on these trucks. Dodge dealers recommend engaging 4-lo, then back in 2-wheel drive, then back in 4-wheel drive hi (4H). This sequence apparently resolves the problem.

How can I tell if my Chevy 4 wheel drive is working?

Check the indicator lights in the knob to find out what driving setting you are in if the vehicle exhibits any unusual behavior. The lights will correspond to the “2” and up-arrow position for two-wheel-drive high, “4” and down-arrow for four-wheel drive low, and so on.

Why is my 4 wheel drive not working?

Turn the transfer case knob that’s to the left of the steering wheel to the two-wheel drive position that’s marked with a “2” and up-arrow icon if you experience a vibration in the steering when driving on dry pavement or making tight turns. The laws of physics mean that a tight turn in four-wheel-drive causes forces to work against each other.

What’s the fuel pressure on a Chevy Blazer?

My Blazer bogs down when you hit the gas and has trouble starting. We have replaced the MAF sensor, plugs, rotor, cap, plug wires, and fuel filter. The fuel pressure is at 50psi when idling and 64 wot when driving. Can we have pressure without flow? Initially the code was p0171. Now that we cleared it it hasn’t come back on.

Why is my Chevy Blazer 98 not working?

Description: This Chevy Blazer 98 4×4 w New venture 233 transfer case had the 4×4 not working. The system can be viewed in 2 parts, the computer controlled parts, which actuate the transfer case and locks the front drive shaft in. And part 2, the mechanical, which involves vacuum actuated and controlled parts.

What kind of engine does a Chevy Blazer have?

Engine 4.3L VIN X 8th Digit Opt LU3 134K MILES!! Fits 03-07 EXPRESS 1500 (Fits: Chevrolet Blazer) 1985? CHEVY BLAZER 2.8 L V6 ENGINE (Carburetor)

Where is the po300 code on a Chevy Blazer?

Or PO300 (Random/Multiple Cylinder Misfire) code. Both of these problems have symptoms you’ve described. The first (Mass Air Flow) is located on the air breather intake (looks like a honey Comb). If not that code then your problem is most likely the cheap plastic distributor that GM installed for that year.

Can a 4×4 truck shift into a 4HI?

Only it’s a 1996 S10 4wd pickup. the truck will shift into 4hi but will not engage. I’ve tried unplugging the Transfer case control module but that did not work. Any suggestions anyone? Alrighty, I took my truck into school today to try figure out the problem.

Why does my 4 wheel drive stop working?

Not open for further replies. My 4 wheel drive recently stopped working properly. It is a 95 4 door Blazer electronic shift vacuum actuated. I replaced the vacuum actuator just recently before the snow fell. The lights flash when I turn the key on like they are supposed to.

Why does my blazer have a 3 button 4WD vacuum?

If you have a 3 button 4WD, there is likely a vacuum switch on top of the transfer case that is easy to replace. It often fails. Finally, a vacuum leak can be caused by a few other things but they may not be detrimental enough to cause the 4wd to not engage.

Is there a push button for four wheel drive?

Vocational, Technical or Tra… I own a 2000 Silverado 1500. 5.3 liter engine, auto transmission,XXXXX The four wheel drive is push button on dash. 108,000 miles. I am getting … read more Vocational, Technical or Tra…

When did I Buy my 2001 Chevy Blazer?

We purchased this 2001 Blazer with the special Trailblazer trim package in 2003 (as the 2nd owner) with 40,000 miles on it and have had it ever since. For our other vehicle, we’ve gone through many other vehicles but can’t part with this one because of how dependable and reliable it has been.

Pre-owned Chevrolet Blazer models are available with a 4.3 L-liter gas engine, with output up to 190 hp, depending on engine type. The Used 2001 Chevrolet Blazer comes with four wheel drive, and rear wheel drive.

Where can I talk about my Chevy Blazer?

For casual talk about things unrelated to Blazers (ie. Off-Topic). Remote Control Vehicles (all… Whether you are building something new or rebuilding something old, post up your build threads here. Open to all projects!

What kind of bumper did Chevy Blazer have?

This is your section! 1993 GMC Jimmy winch bumper… Post Pictures, Videos, and Sound clips here. Examples: Member signature threads, photo shoots, videos (that do not fit in other sections), etc. Headlight ideas.

What are the rules for the Blazer Forum?

BlazerForum Rules – please read and follow the rules of the forum. “I didn’t know…” is no excuse. There is a wealth of information available on the site. Please search before posting.

Why does my Chevy Blazer not 4 wheel drive?