GM Service Manual Online
For 1990-2009 cars only

Shifting Into Park Automatic Transmission

Caution: It can be dangerous to get out of the vehicle if the shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on fairly level ground, use the steps that follow. If you are pulling a trailer, see Towing a Trailer .

To shift into PARK (P), use the following steps:

  1. Hold the brake pedal down with your right foot.
  2. Move the shift lever into PARK (P) by pressing the button on the front of the shift lever while pushing the lever all the way toward the front of the vehicle. Release the button.
  3. With your right foot still holding the brake pedal down, set the parking brake with your left foot. See Parking Brake for more information.
  4. Turn the key to OFF.
  5. Remove the key from the ignition switch and take it with you. If you can leave your vehicle with the key in your hand, the vehicle is in PARK (P).

Leaving Your Vehicle With the Engine Running (Automatic Transmission)

Caution: It can be dangerous to leave the vehicle with the engine running. The vehicle could move suddenly if the shift lever is not fully in P (Park) with the parking brake firmly set. And, if you leave the vehicle with the engine running, it could overheat and even catch fire. You or others could be injured. Do not leave the vehicle with the engine running.

If you have to leave your vehicle with the engine running, be sure your vehicle is in PARK (P) and your parking brake is firmly set before you leave it. After you have moved the shift lever into PARK (P), hold the regular brake pedal down. Then, see if you can move the shift lever away from PARK (P) without first pushing the button on the shift lever. If you can, it means that the shift lever was not fully locked into PARK (P).

Torque Lock (Automatic Transmission)

If you are parking on a hill and you do not shift your transmission into PARK (P) properly, the weight of the vehicle may put too much force on the parking pawl in the transmission. You may find it difficult to pull the shift lever out of PARK (P). This is called "torque lock." To prevent torque lock, set the parking brake and then shift into PARK (P) properly before you leave the driver's seat. To find out how, see "Shifting Into PARK (P)" listed previously.

If torque lock does occur, you may need to have another vehicle push yours a little uphill to take some of the pressure from the parking pawl in the transmission, so you can pull the shift lever out of PARK (P).