Good work!
You'll be suprised at the "howdy doodies" you'll find in cars that people do. My 79 Trans Am must have had every bolt in it but the right GM ones. I've spent hours researching the right stuff in the GM assembly manuals I have. Luckily, I have great dealers that will take those original #s and supersede them up to a current # or find the bolts I need under the original #. Either way, I get the right bolt in 99% of the cases. Sometimes GM does a stupid supersession to a generic bolt, but most times, you get something that at least remotely looks like the original.
For the few that were discontinued, I pirated them from junkers and cleaned them up.
My key buzzer wouldn't work, so I got out the shop manual and went to work. This is how you get good at these things. I followed the diagnostic charts in the GM manual and walah, it pointed to a bad buzzer switch. Neighbor and I took it apart and found out the switch looked like it went through WWII, it was mangled. The buzzer motor was also gone. Ordered one from GM (it sounds like a Chevy buzzer more than a Pontiac), got a new buzzer switch from AC Delco through my parts store and problem solved.
I have fixed many "repairs" this car has had with some thinking power and simple TLC... Joe--ASE Certified Parts Specialist & 10th Ann.Club Tech Director '80 Carousel Red Turbo T/A, 27k orig. '79 "Y89" 400/4 speed 10th Ann. T/A, 57k orig '84 Olds 88 Royale Bgm 2 dr, 307 "Rocket" (lol), 143k and still going.... '91 S10 Blazer 4.3Z