Question about 2001 GMC Sierra Crew Cab
There is no electric solenoid set up for the S10's, the upgrade was for the full size SUV's from the early 88 to 98 that had a thermal actuator. There is a mechanical system that is made for the S10's but it requires drilling a hole through your fire wall, running a cable into your cab and mounting the cable lock somewhere under your dash for easy access to lock in your differential.
I had the same problem and i just locked up my front differential all the time, it's been like that now for over 10 years without any issues. The transfer case is not locked up so your front axle is still not synced with your rear axle and is still free to rotate at a different speed then the rear. Just make sure you service the front differential like your suppose to and you should be fine on running with the front differential locked.
Thank you for using fixya and check to make sure that there is no cracks i your vacuum line that is keeping your front actuator from functioning or a failed vacuum switch on top of the transfer case.
Posted on May 13, 2010
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Posted on Jan 02, 2017
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