GM Service Manual Online
For 1990-2009 cars only

Condition

Causes

The lock system does not lock.

    • A broken lock bolt spring
    • A worn lock bolt spring
    • A damaged sector
    • A damaged lock cylinder
    • A burr on the lock bolt
    • A damaged housing
    • A damaged rack
    • An interference between the bowl and rack coupling
    • A binding ignition switch
    • A restricted actuator rod
    • A sector installed incorrectly
    • A shift lever not in the PARK position
    • A park lock cable incorrectly adjusted
    • Damaged park lock components