2003 GMC Van 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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Wednesday, January 27th, 2010 AT 11:41 AM

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