2002 GMC Sierra Service 4WD Light

2002 GMC SIERRA

100,000 MILES • V8 • 4WD • AUTOMATIC

JOEL.S.HOLMES

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My GMC 2002 Sierra has the service 4WD light on. The truck moves in Auto 4WD, 4WD HI, and 4WD Lo, but will not move in 2WD HI. the truck is rarely in 4WD anything and allways in 2WD. Please Help.

Apr 4, 2010 at 1:44 PM

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.