Mechanics

AWD SERVICE QUESTION

2003 GMC Van

Drive Train Axles Bearings problem
2003 GMC Van 6 cyl All Wheel Drive Automatic 64000 miles

I have a 2003 GMC AWD Astro Van. There is a " AWD Service" light coming on. What does that mean and what are the possible reasons. Also what is the difference between 4-wheel drive and all whell drive?

Thanks for your help
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Ielzhenni
January 27, 2010.



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