So I'm sick of driving my GTV6 in the summer without air conditioning. The original system is intact, but the compressor is kaput. I have no idea what other bits 'n' pieces are similarly dead and don't want to start ordering replacements willy nilly until I know what I'm dealing with. Maybe it's as simple as a new compressor, or maybe the entire system needs to be yanked and replaced with a Vintage Air or similar.

Any suggestions for the ATX region?