Vortec 5.3L V8 SFI VVT Flex Fuel. 6-Speed Automatic. and 4WD. Terra firma trotter. Kicks noise to the curb. This attractive 2010 GMC Sierra 1500 is the truck that you have been looking to get your hands on. This Sierra SLT is still a pretty special truck. showing off the superior ride and handling that have earned it accolades from pretty much every reviewer who got behind the wheel. The drivability is good enough to be a capable commuting vehicle for someone who wants a pickup on the weekend for hauling toys or projects. J.D. Power and Associates gave the 2010 Sierra 1500 5 out of 5 Power Circles for Overall Initial Quality Design....