The most powerful Silverado HD ever. The Vortec™ 6.0L V8 engine with Z85 Handling/Trailing Suspension makes this truck a solid worker. And the Hydra-Matic 6-speed transmission makes it ready for any job you put throw at it. Comes with Heavy Duty Trailering Package and G80 automatic locking rear differential for added dependability. This heavy duty truck has single rear wheel and available in regular, extended and crew cab models. Offers the convenience of cruise control.