GMC Sierra Owners Manual
Adjustable Throttle and Brake Pedal
On vehicles with this feature, you can change the position of the throttle and brake pedals.
No adjustment to the pedals can be made when the vehicle is in R (Reverse) or while using cruise control.
The control used to adjust the pedals is located on the instrument panel below the climate control system.
Press the bottom of the control to move the pedals closer. Press the top of the control to move the pedals away.
Before you start driving, fully press the brake pedal to confirm the adjustment is right for you. While driving, make only small adjustments.
The vehicle may have a memory function which lets pedal settings be saved and recalled. See Memory Seats on page 3‑7.