Question about 2008 Chevrolet Silverado 2500HD

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4wd not engaging. Check actuator and seems to working properly. Jacked front end up and and when in 4wd the front tires spin freely. Any suggestions?

Was trying to pull someone out and heard a "clunk" in the front end. Now 4wd will not engage the front tires. Checked actuator and it seems to working properly. Jacked the front end up and put truck in 4wd and tires spin freely. Any suggestions??

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  • Justin Ramm
    Justin Ramm Jan 02, 2014

    Yes Dan. The front driveshaft spins when I put it into 4wd

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  • Contributor
  • 41 Answers

Does the driveshaft for the front wheels turn when in 4wd? The actuater might work but the diff lock for the front wheels might have broken. If the front driveshaft does not turn when in 4wd, the transfer case might be the problem.

Posted on Jan 02, 2014

Testimonial: "Yes. The front drive shaft does turn."

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Posted on Jan 02, 2017

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gladys_neal
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SOURCE: I have a 2001 Chevy 2500 4X4. Four wheel drive not

Sounds like the chain in the transfer case has broke or the linkage is out of adjustment

Posted on Dec 08, 2009

  • 1 Answer

SOURCE: I have a 1990 K1500 4X4 Chevy pickup that wont

I had the same problem on my 90 K1500, it was the 4 wheel drive actuator unit itself. Bout it at the local parts store for 30 bucks and installed it in 10 minutes or less - and vavoom! 4 X 4 back in business.

Posted on Sep 28, 2009

  • 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

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