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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 ...

StabiliTrak® System
The vehicle has a traction control system that limits wheel spin, and the StabiliTrak system that assists with directional control of the vehicle in difficult driving conditions. Both systems turn on ...

Airbag Readiness Light
The system checks the airbag's electrical system for possible malfunctions. If the light stays on it indicates there is an electrical problem. The system check includes the airbag sensor(s), the prete ...