Question about 2003 Chevrolet TrailBlazer

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My four-wheel drive does not work

The light on the dash does not light up on the selected transmission settting.The four wheel drive worked before this happened

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  • nlk4201 Feb 03, 2009

    The transmission is working properly in two wheel. I have used a diagnostic computer and the four wheel will not communicate with the diagnostic unit. All vacuum lines and electrical plugs seem to be ok. My thought is that I have lost power under the dash somewhere but I do not have a electrical diagram complete enough to know where to look.

  • blkstrat58 Feb 14, 2009

    Similar problem but sometimes 4 wheel works then it dosent lights work then dont i belive its a fuse or relay ( Im not a mechanic hard to tell huh) Manual with truck dosent have a clear understang where to find either by the way truck is a 98 suburban



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First of all when u push the button is there any noise under the car if not the motor on the transfer case could be bad first check all fuses in owners manual some could be under the hood
if u have power and have a noise under the car it could be the plastic inserts on the shift fork inside the transfer case it will have to come out!!!!!! the shift motor is on the drivers side of the transfer case and held in by three bolts remove the front drive shaft first with the motor loose try the shift motor
and see if it turns watch out for the metal shield behind the motor if it doesn't turn it is probably bad
hope I helped the last one I fixed I took the motor loose (let it hang) checked it out it worked when I put it back together ?????????? good luck

Posted on Feb 02, 2009


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