Sierra 1500 SLE 4D Crew Cab Vortec 5.3L V8 SFI 6-Speed Automatic RWD and Gray. Look! Look! Look! Yes! Yes! Yes! Take your hand off the mouse because this 2009 GMC Sierra 1500 is the truck you've been trying to find. J.D. Power and Associates gave the 2009 Sierra 1500 4.5 out of 5 Power Circles for Overall Initial Quality Design. This Sierra SLE offers segment-leading fuel economy thanks to the Active Fuel Management-equipped 5.3L V8 engine that cuts the operation of four cylinders when they are unneeded.