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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 ...

Special Application Services
○ Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/ 3,000 mi. ○ Have underbody flushing service performed once a year. ...

Electric Brake Control Wiring Provisions
These wiring provisions are included with the vehicle as part of the trailer wiring package. These provisions are for an electric brake controller. The instrument panel contains blunt cut wires behind ...