2002 GMC Sierra Service 4WD Light

2002 GMC SIERRA
100,000 MILES • V8 • 4WD • AUTOMATIC
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JOEL.S.HOLMES
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  • 1 POST
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
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Have you had the computer scanned?
Apr 4, 2010 at 11:14 PM
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