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Four Wheel Drive Trouble

norsemanberg

By norsemanberg
in Ask A GM Technician

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norsemanberg Enthusiast

norsemanberg

Posted
Posted

Well I'm having some trouble with my four wheel drive. I have the push button 4X4 with the auto 4X4 and while the snow was really coming down lastnight I went to put it in to 4X4 and the light went from the 2 wheel drive to the 4 wheel with no problem but when I steped on the throttle the rearend kicked loose so I knew it wasent locked in, but the light said I was. I then went back to 2WD as i was driving and the back to 4WD. I had to do this 4 or 5 tome untill i just said SCREW IT and left it in the 4WD setting, then after about 3or 4 miles of driving it finaly kicked in to 4WD. Now I checked to see if the accuator for the front axle was working and i can feal it working when some one pushes the button while i'm under the truck an the t case is locking in because the front drive shaft is locking. So i'm thinking it must be in the front axle but if there was something wrong with the electronics it should throw a code right? PLEASE HELP it still snowing like a ....... well you know. :rollin:

kenmackay New Member

kenmackay

Posted
Posted

I am having the same problem in my 2000 gmc sierra 1500. When I select 4Hi or 4 Lo on the electronic engagement the light will come on, indicating it is in 4 wheel, but the front wheels will not engage. When the light switches over from 2 wheel drive to 4 there is a noise from under the truck that sounds like 4 wheel engaging, but nothing happens. Any ideas? thanks everyone.

 

-Ken

  • 1 year later...
1BAD02 Enthusiast

1BAD02

Posted
Posted

I m having the same exact problem as both of you. It feels and sounds like it is engaged but when i try to drive it, its only in 2wd even though it says 4lo. Its been sitting for about 2-3 months and the last time i used the 4 wheel drive it worked just fine. I dont know if its the cold messing it up or what but im really considering doing a front axle swap but havent decided yet. Let me know if either of you guys find out whats wrong, and ill do the same.

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