Mechanics

SERVICE 4WD LIGHT

1999 GMC Jimmy

1999 GMC Jimmy 6 cyl Four Wheel Drive Automatic 160000 miles

My service 4wd light came on. It does this periodically but seems to be more frequent lately. I have gone to autozone and had them hook their reader to it but they couldn't get it to work. I just need some ideas as to what might be causing this.
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Spencer1974
July 21, 2010.




Could be any of the items in the 4wd control system. Unfortunately you will need to find a shop with a real scanner capable of accessing the 4wd system to see why the warning has been coming on. Once the codes are retrieved we can figure out what to fix

Tiny
Jack42
Jul 21, 2010.


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