1999 Chevy Blazer Service 4 wheel drive light

1999 CHEVROLET BLAZER
154,000 MILES • 6 CYL • 4WD • AUTOMATIC
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DROFFIG
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The service four wheel drive light is on and the 4 four wheel drive doesn't work. how can i check to see the code and what are the most common problems when the service light is on?
Apr 4, 2010 at 3:49 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.
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