Question about 1999 GMC Jimmy
Service light is on and the lights on the 2wd - 4 hi - 4 low are out
There was a problem with the push button type.cols solder joint on circuit board. Or the Actuator at the transfer case is gone out. I believe it goes through a self test every time the key is turned on.If there is a short or open when tested is disengages 4x4(no light at switch). A scan tool can tell if its the switch or actuator. Not the little cheap scan tool the high dollar one most shops own.
Posted on Dec 06, 2012
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Posted on Jan 02, 2017
SOURCE: 4x4 not shifting into high
hi how are you doing? just had same problem with by gmc i replaced the transfurcase motor and it works fine. the electric motor moves the shifter in your transfurcase from 4hi to 4lo and 2hi.there is only 3 things that operate your 4x4 the switch the motor and the control modgual.
Posted on Jan 28, 2009
SOURCE: 2000 yukon xl. 4x4 wont engage
My 2000 Yukon XL with 5300 engine had same problem at 115,800 miles in Aug 2006(I bought the vehicle new January 2000)...My GMC dealer did diagnostic and replaced a faulty 4WD Transfer Case Shift Control. (reading from the service invoice) It was GM part number 15709327. Cost for the repair was $41.48 + labor $74.13, total was $115.71...it now has 165,000 on it and so far no problem and the 4WD works when I need it.
Posted on Feb 27, 2009
Most likely this is a simple dissconnection on the top of the Trans. I believe that your model is electronically controlled, but vacuum shifted. Check the small hose that runs from the intake to the top of the trans. Let me know if this helps :)
Posted on May 27, 2009
Tips for a great answer:
4 wheel drive system will not disengage?
4WD light is flashing and beeping? NO 4WD high? http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html
----------------This will help.Thanks.
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