GM Service Manual Online
For 1990-2009 cars only

Cause

Action

The automatic transmission shift lock control system is damaged.

Repair or replace as required. Refer to Automatic Transmission Shift Lock Control Disassemble - Off Vehicle or Automatic Transmission Shift Lock Control Assemble - Off Vehicle .

The housing assembly is damaged.

Replace the housing assembly.

The shaft assembly is damaged.

Replace the shaft assembly.

The park lock cable is not adjusted properly.

Adjust the park lock cable. Refer to the appropriate procedure in Parking Brake from the following list: