Removal Procedure

IMPORTANT: Perform the body control module (BCM) theft deterrent relearn procedure whenever you replace the ignition switch lock cylinder.

Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
Remove the instrument panel (I/P) cluster trim plate. Refer to Trim Plate Bezel Replacement - Instrument Panel (I/P) Cluster (Impala) or Trim Plate Bezel Replacement - Instrument Panel (I/P) Cluster (Monte Carlo) .

Fig 1: Holding Detent On Ignition Lock Cylinder

Courtesy of GENERAL MOTORS CORP.

Insert the key and turn the ignition lock cylinder to the ON/RUN position.
Using a small curved tool or an L-shaped hex wrench, depress and hold the detent on the ignition lock cylinder. Access the detent by placing the tool through the I/P opening to the right of the ignition switch. If you cannot locate the detent with the tool, lower the ignition switch away from the I/P. Refer to Ignition Switch Replacement .

Fig 2: Key & Lock Cylinder

Courtesy of GENERAL MOTORS CORP.

Using the key as an aid, pull to remove the lock cylinder from the switch.
Remove the key from the lock cylinder.
If the cylinder does not rotate or is seized, follow the procedure in the ignition switch replacement. Refer to Ignition Switch Replacement .