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 needed.

The lock cylinder housing assembly is damaged.

Replace the lock cylinder housing.

The shaft assembly is damaged.

Replace the shaft assembly.

The ignition switch assembly is damaged.

Replace the ignition switch assembly.

The shaft linkage adjustment is improper.

Adjust the shaft linkage adjustment.

The rack preload spring is broken or weak.

Replace the rack preload spring.

The park lock cable is not adjusted properly.

Adjust the park lock cable.

The key is incorrect, bent, or twisted.

Replace the key.

The rack is bent or broken.

Replace the rack.