GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Turn ON the ignition switch.

    • The steering column UNLOCKS.
    • The scan tool displays the following BCM data:
       - Steering column lock state = IGN ON UNLOCKED
       - Key IN ignition = ACTIVE
       - Column feedback = ACTIVE

2

Turn OFF the ignition switch (key still in the ignition).

    • The steering column remains UNLOCKED.
    • The scan tool displays the following BCM data:
       - Steering column lock state = IGN OFF UNLOCKED
       - Key IN ignition = ACTIVE
       - Column feedback = ACTIVE

3

Remove the key from the ignition switch.

    • The steering column LOCKS.
    • The scan tool displays the following BCM data:
       - Steering column lock state = IGN OFF LOCKED
       - Key IN ignition = INACTIVE
       - Column feedback = INACTIVE

4

Reinsert the key into the ignition switch.

    • The steering column remains LOCKED.
    • The scan tool displays the following BCM data:
       - Steering column lock state = IGN OFF LOCKED
       - Key IN ignition = ACTIVE
       - Column feedback = INACTIVE

5

Turn ON the ignition switch.

    • The steering column UNLOCKS.
    • The scan tool displays the following BCM data:
       - Steering column lock state = IGN ON UNLOCKED
       - Key IN ignition = ACTIVE
       - Column feedback = ACTIVE