99 Tahoe. My ignition switch went out, easy enough. Upon replacement the plastic piece below the lock cylinder that the ignition switch assembly goes onto broke. What is that part called? Auto parts stores couldn't help. I'm up the creek without my paddle currently.

 

The part I needed was called ignition lock cylinder case. Ended up going to the dealer for it to be sure I got the correct assembly. Not many people break that piece from the research I was doing.