See also:

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 ...

Forward Collision Alert (FCA) Warning Light
These lights are located on the center of the instrument panel. The vehicle ahead light comes on when a vehicle is ahead and a possible collision can occur. The forward collision alert comes o ...

Parking Brake
To set the parking brake, hold the regular brake pedal down, then push the parking brake pedal down. If the ignition is on, the brake system warning light will come on. See Brake System Warning Li ...