Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
You will need a couple of special tools to do this. A steering wheel puller and a lock plate depressor. Maybe can rent from a local parts store. Am sending you the basics, if you need more let me know.
REMOVAL & INSTALLATION
See Figures 1 and 2
Remove the steering wheel.
Fig. 1: Installing the lock cylinder
Fig. 2: Ignition switch
Remove the turn signal switch. It is not necessary to completely remove the switch from the column. Pull the switch rearward far enough to slip it over the end of the shaft, but do not pull the harness out of the column.
Turn the lock to Run.
If necessary, remove the ignition key.
If equipped, remove the buzzer switch assembly.
Remove the lock retaining screw and remove the lock cylinder. WARNING If the retaining screw is dropped on removal, it may fall into the column, requiring complete disassembly of the column to retrieve the screw.
Rotate the key to the stop while holding onto the cylinder.
Push the lock all the way in.
Install the screw. Tighten the screw to 40 inch lbs. (5 Nm) for regular columns, 22 inch lbs. (2.5 Nm) for tilt columns.
Install the turn signal switch and the steering wheel.
I just recently purchased a 2004 Tahoe with 155000 miles