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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 ...

Inserting a CD (Single CD Player)
Insert a CD partway into the slot, label side up. The player pulls it in and the CD should begin playing. ...

Rear Seats (All Split Bench and Hybrid Full Bench)
Folding Rear Seat Either side of the rear seat can be folded for added cargo space. Notice: Folding a rear seat with the safety belts still fastened may cause damage to the seat or the safety belts. ...