When I purchased my 96 Tahoe, I was flipping through the owners manual and noticed the anti-theft system built into the stock stereo.
That made me think for a moment. If I was a car stereo thief, would I be looking to steal GM stock stereo systems???

Not quite!!!

Just another kickback for dealerships to get an easy buck by charging 50-60 bucks to unlock your stereo!!! Geesh!!!