GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Transaxle in PARK.
  2. Turn the ignition switch on.
  3. Press and hold the brake pedal.
  4. Shift the transaxle out of PARK.

Transaxle can be shifted from park.

Automatic Transmission Shift Lock Control Inoperative

2

  1. Shift transaxle into PARK.
  2. Release the brake pedal.
  3. Attempt to shift the transaxle out of PARK.

Transaxle will not shift out of park.

Automatic Transmission Shift Lock Control Always On With Ignition in RUN

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.