Extended Cab White and 2010 GMC Sierra 1500. 4WD! Flex Fuel! GMC has outdone itself with this tremendous reliable 2010 GMC Sierra 1500. It just doesn't get any better at this price! Consumer Guide Recommended Large Pickup. Historical track record of longevity on the road. Ask about our preowned superstore one year maintenance lifetime inspections with every preowned vehicle purchased. Prices only good for day they appear. All prices are subject to change. We cannot extend special Internet pricing without a printed copy of the online pricing the in-store price may exceed our special online pricing.