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Exterior
GM says it sought to provide a "confident and strong stance" with the Terrain's styling. To that end, the crossover has oversized fenders and liberal bumper cladding, both of which set t ...

General Information
Your vehicle is an important investment. This section describes the required maintenance for the vehicle. Follow this schedule to help protect against major repair expenses resulting from neglect or i ...

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 ...