4D Crew Cab, Vortec 5.3L V8 SFI, 4-Speed Automatic with Overdrive, 4WD, CD player, and CLEAN CARFAX. Spotless One-Owner! GMC Reliability! You won't find a nicer 2007 GMC Sierra 1500 than this one-owner creampuff. This Sierra SLE1 series is an example of the GM truck that won pretty much every award out there when it was redesigned that year. Simply one of the smoothest-riding and quietest half-tons you'll ever drive, or ride in. J.D. Power and Associates gave the 2007 Sierra 1500 4.5 out of 5 Power Circles for Overall Initial Quality Design.