GM Service Manual Online
For 1990-2009 cars only

Cause

Action

The auto trans shift lock control system is damaged.

Repair or replace the auto trans shift lock control as required.

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.

Faulty lock cylinder.

Replace the lock cylinder. Refer to Ignition Lock Cylinder Replacement - On Vehicle .