GM Service Manual Online
For 1990-2009 cars only

Caution: If you do not park the vehicle properly, it can roll. If you have left the engine running, it can move very quickly. You or others could be injured. To be sure the vehicle will not move, even when you are on level ground, follow the steps below.

Parking a Vehicle With the Two-Speed Rear Axle

  1. With the engine running, shift the two-speed rear axle into low. To be sure it is in low, you will need to move the vehicle in gear just a little.
  2. Hold the brake pedal down.
  3. Apply the parking brake. See Parking Brake for parking brake apply procedure.
  4. Shift the transmission to N (Neutral) for manual transmission or P (Park) for automatic transmission.