2003 GMC Yukon Owner's Manual - Page 115

Adjustable Throttle and Brake Pedal If your vehicle is equipped with this feature, you can change the position of the throttle and brake pedals. This feature is designed for shorter drivers, since the pedals can not move farther away from the standard position, but can move toward the driver for better pedal reach. The vehicle must be in PARK (P) for this feature to operate. The switch used to adjust the pedals is located on the driver's side door panel. Engine Coolant Heater In very cold weather, 0°F (−18°C) or colder, the engine coolant heater can help. You'll get easier starting and better fuel economy during engine warm-up. Usually, the coolant heater should be plugged in a minimum of four hours prior to starting your vehicle. At temperatures above 32°F (0°C), use of the coolant heater is not required. Press the arrow at the end of the switch closest to you to move the pedals closer to your body. Press the arrow at the far end of the switch to move the pedals away from your body. 2-21