New for 2012

E85 ethanol capability is now available for the 2.4-liter Ecotec four-cylinder engine. A touch-screen CD stereo is standard on all models, and GMC IntelliLink enables smartphone integration and the ability to stream music from Pandora and other music services. The standard backup camera's image now appears on the stereo's screen, and a lane departure and forward-collision warning system is optional.

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    Powertrain details
    The GMC Sierra All Terrain HD concept is propelled by the new, production 6.6L Duramax turbo-diesel V-8 and Allison 1000 six-speed automatic transmission powertrain combination offered in the 2011 ...

    Rear Climate Control System (Rear Climate Control Only)
    A. Fan Control B. Temperature Control C. Air Delivery Mode Control For vehicles with the rear climate control system, the controls are located on the rear of the center console. The system can al ...

    Eight Way Power Seats
    To adjust a power seat, if equipped: ○ Move the seat forward or rearward by sliding the control forward or rearward. ○ Raise or lower the front or rear part of the seat cushion by movi ...