2005 GMC Sierra 1500 Pickup Owner's Manual - Page 113

Key Release Button (Manual Transmission) The ignition key cannot be removed from the ignition of manual transmission vehicles unless the key release button is used. Retained Accessory Power (RAP) If the vehicle has Retained Accessory Power (RAP), certain features will continue to operate for up to 10 minutes after the ignition key is turned to LOCK unless a door is opened. Starting Your Engine Your vehicle is equipped with Starter Motor Control. This feature assists in starting the engine and protects the electrical system. This feature may cause the engine to crank even after the ignition key is not in START. Automatic Transmission To remove the key on manual transmission vehicles, turn the key to ACCESSORY, then press the button and turn the key to LOCK. Do not hold the button in while turning the key to ACCESSORY. Pull the key straight out. Move your shift lever to PARK (P) or NEUTRAL (N). Your engine will not start in any other position - that is a safety feature. To restart when you are already moving, use NEUTRAL (N) only. If you have a diesel engine refer to the diesel supplement for the starting procedure. Notice: Do not try to shift to PARK (P) if your vehicle is moving. If you do, you could damage the transmission. Shift to PARK (P) only when your vehicle is stopped. 2-23