1999 GMC Jimmy Service 4WD Light

1999 GMC JIMMY
160,000 MILES • 6 CYL • 4WD • AUTOMATIC
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SPENCER1974
  • MEMBER
  • 1 POST
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.
Jul 21, 2010 at 5:59 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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2CARPRO JACK
  • CAR REPAIR CONTRIBUTOR
  • 11,533 POSTS
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
Jul 21, 2010 at 8:30 AM
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