Removal Procedure

Disconnect the battery negative cable.
Disable the SIR system. Refer to DISABLING & ACTIVATING AIR BAG SYSTEM .
Remove the steering wheel. Refer to STEERING WHEEL REPLACEMENT .
Remove the tilt lever close out plate.
Remove the retaining screw from the lower steering column trim covers.
Tilt the trim cover down and slide rearward in order to disengage the locking tabs. Remove the lower steering column trim covers.
Remove the retaining screws from the upper steering column trim cover.

Fig 1: Removing Tilt Lever Close Out Plate
Courtesy of GENERAL MOTORS CORP.
Lift the trim cover in order to gain access to the lock cylinder access hole (1).

Fig 2: Locating Lock Cylinder Access Hole
Courtesy of GENERAL MOTORS CORP.
Insert the Snap-On A173A bent-tip awl (1) or equivalent, with a 2.5 mm (3/32 in) tip, and 20 mm (3/4 in) in length, into the access hole of the ignition lock cylinder.
Turn the ignition lock cylinder to START.
Use the bent tip in order to push down on the ignition lock cylinder retainer.
Release the ignition lock cylinder to the RUN position.

Fig 3: Releasing Ignition Lock Cylinder
Courtesy of GENERAL MOTORS CORP.
Remove the ignition lock cylinder from the lock cylinder case.

Fig 4: Removing Ignition Lock Cylinder
Courtesy of GENERAL MOTORS CORP.