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Overview
The GMC Sierra All Terrain HD concept is an exploration of heavy-duty truck capability combined with greater off-road versatility. It is highlighted by a bold exterior design, enhanced all-terrain ...

Cruise Control
With cruise control, the vehicle can maintain a speed of about 40 km/h (25 mph) or more without keeping your foot on the accelerator. Cruise control does not work at speeds below 40 km/h (25 mph). ...

Dual Automatic Climate Control System
Dual Automatic Climate Control System A. Driver and Passenger Temperature Controls B. Fan Control C. AUTO D. Defrost E. Air Recirculation F. Outside Air G. Air Delivery Mode Control H. Dis ...