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S10 Chevy 4x4 problems

Can't get actuator cable to engage system

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 124 Answers

SOURCE: chevy s10 4 wheel drive will not engage

There is a vaccuum operated switch located on the transfer case that sends vaccum to the accuator that pulls a cable that locks the front end in. Check for vac coming in and out of this switch if no vac out replace it. This switch is a very common problem. You can find them at most parts stores in the help section #49315. please rate.

Posted on Dec 08, 2008

  • 8 Answers

SOURCE: 4 wheel drive will not engage - how do I troubleshoot

The vacuum switch on the transfercase is most likely the problem. If you remove it and the plunger is stuck in, replace it and your 4wd should engage again.

Posted on Oct 05, 2009

wracefans24
  • 1985 Answers

SOURCE: 1989 Chevy S10 Blazer, 4.3L V6. 4wd not working.

under the battery is where you need to check first,then follow it down around the right front wheel well,

Posted on Dec 09, 2009

Tnsiouxfalls
  • 617 Answers

SOURCE: 1991 Chevy S10 Blazer 4.3 4x4

4170636.jpgThis is all I've got.Hope this helps?

Posted on Dec 20, 2009

  • 1 Answer

SOURCE: 1990 Chevy 1500 4x4 won't engage 4 wheel drive

the 4x4 do not engage in my1990 chevy pick up what i need to check

Posted on Jan 20, 2010

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Dec 25, 2015 | Chevrolet Cars & Trucks

1 Answer

A buddy of mine has a s10 2001 blazer and the 4x4 isn't working, and was wondering how to replace the vacuum hose, if this is causing the problem?


2001 does not utilize vacuum to engage the front axel. A cable is used. There are a few conditions that can cause this. The most likely is the encoder motor. It's best to have the vehicle scanned. The TCCM is located behind the right kick panel, sometimes if it's unplugged and plugged back in, it will begin to work again.

Feb 28, 2013 | 2001 Chevrolet Chevrolet Blazer

1 Answer

Why won't my front differential engage? 1988 Chevy


Ok I know this question is old but for any one else who has this problem, I want to clear some info up. GM did not use vacuum on the 4x4 systems on the full size series. Only used on the S series (S10, S Blazers). Here is how to accurately trouble shoot these problems with the full size 4x4. Remove the front actuator from the front axle ( keep it plugged up and let it hang). Put the T-Case in 4x4 Hi or Lo doesn't matter. Turn key on (don't start the engine) . Now check the actuator to see if it has extended. If (no) now check the plug to see if you have current . If you have current to the plug, change the actuator. Problem solved. If no current to the plug. Check for broken wires ( fix if any) If no broken wires. There is another switch on the T-Case that sends power to the actuator Replace it.. Back to the actuator.... If everything checked out and actuator works. With the T-Case locked in 4x4, try to turn the front drive shaft by hand. With the T-Case locked in 4x4 you shouldn't be able to turn the drive shaft. If drive shaft doesnt turn the T-Case is in good shape and the problem will be in the front differential. In these cases the most common problem is an exploded thrust washer. At this point the front differential needs to be rebuilt. Back to the T-Case..... With the T-Case locked in 4x4, if the drive shaft spins, the problem will be in the T-Case and at this point the T-Case will need rebuilt......... I hope you get the information you need to troubleshoot the GM 4x4 issues.

Feb 21, 2012 | 1988 Chevrolet K1500

1 Answer

I have a chevy 1500 4wd 1999 it doesn't go into 4wd sometimes ,i get service 4wd what could be the problem


I HAVE A 96 S10 LT BLAZER THE SYSTEM IS THE SAME THE WAY ITS WORKS IS ON ENGINE VACUUM A CABLE FROM A VACUUM ACTUATOR LOCATED UNDER THE BATTERY TRAY RUN TO THE SHFFT HOUSING THATS BOLTED TO THE FRONT CARRIER IT PULLS ON A SHAFT TO ENGAGE 4X4 THE PROBLEM IS THE CLIP THAT HOLDS THE CABLE TO THE SHAFT **** ITS NOT MUCH MORE THEN A PAPER CLIPI TOOK OFF MY SHIFT HOUSING BENT THE CLIP SO I WOULD ALWAYS WORK SEEING CHEVY WON;T SELL JUST THE CLIP WITH OUT THE CABLE I HAVEN;T HAD A PROBLEM SENCE


Oct 10, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

1988 chevy s10 blazer 4x4 , 4x4 will not engage , changed most of the vacuum lines and still nothing ... aggravated


Have you checked the vacuum actuator under the battery? Battery acid will leak down and cause all kinds of issues with them.

Sep 26, 2010 | 2003 Kia Spectra

3 Answers

1991 Chevy S10 Blazer 4.3 4x4


4170636.jpgThis is all I've got.Hope this helps?

Dec 20, 2009 | 1991 Chevrolet S-10 Blazer

1 Answer

I have a 2000 chevy s10 zr2 4x4 and the four wheel drive isnt working sometimes it will work and others it wont even activate


there is a vacuum actuator under the battery tray. it is the most common cause for this issue. also the cable that goes from that actuator to the differential stretches sometimes causing it to engage and not engage depending on how bad it is.

if you have any more question please ask/

Oct 29, 2009 | 2000 Chevrolet S-10

3 Answers

1987 s10 chevy truck 4x4 not engaging


By the way, if that happens again (Same thing happened to me) It was inside the front diff. That vacuum actuator that sits on the passenger side that has a vacuum hose going up to it has a built in cable that plugs into the front diff. There are little springs that go bad and there is no tension on the cable. It retracts but doesn't engage the axle.

It's 3 bolts, then pry it open just enough to get access to the spring that holds the cable together. ;) That's how I fixed my problem permanently

Aug 03, 2009 | 1989 Chevrolet S-10 Blazer

2 Answers

My chevy k1500 4x4 problem


http://www.automotiveforums.com/t173603.html

It is called a thermostatic actuator; you can purchase one at most auto part stores or at the dealership. I have also seen a manual cable replacement kit that bypasses the thermostatic unit.

Nov 21, 2008 | 1992 Chevrolet C1500

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