2005 GMC Envoy Owner's Manual - Page 99

{CAUTION: It is dangerous to get out of your vehicle if the shift lever is not fully in PARK (P) with the parking brake firmly set. Your vehicle can roll. Do not leave your vehicle when the engine is running unless you have to. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure your vehicle will not move, even when you are on fairly level ground, always set your parking brake and move the shift lever to PARK (P). See Shifting Into Park (P) on page 2-32. If you are pulling a trailer, see Towing a Trailer on page 4-55. {CAUTION: If you have four-wheel drive, your vehicle will be free to roll - even if your shift lever is in PARK (P) - if your transfer case is in NEUTRAL. So, be sure the transfer case is in a drive gear - not in NEUTRAL. See Four-Wheel Drive on page 2-27. See Shifting Into Park (P) on page 2-32. Ensure the shift lever is fully in PARK (P) before starting the engine. Your vehicle has an automatic transmission shift lock control system. You have to fully apply the regular brakes before you can shift from PARK (P) when the ignition key is in RUN. If you cannot shift out of PARK (P), ease pressure on the shift lever, press the button on the shift lever and push the shift lever all the way into PARK (P) as you maintain brake application. Move the shift lever into the gear you wish. See Shifting Out of Park (P) on page 2-34. 2-25