2011 GMC Sierra All Terrain HD Concept
2011 GMC Sierra All Terrain HD Concept All the new HD 2011 HD Sierra fertile ground for the concept chassis modified by production and 4WD Duramax Diesel / Allison 1000 six-speed powertrain. The suspension is upgraded and unique body dimensions, including ground clearance and a wider track and approach / departure angle Grand supply and improve off-road capability while maintaining a