Update: I checked the fuse system, and where the large relay is that reads "AC COS" or something to that effect is missing. The red 10a fuse you mentioned is not the ac clutch, but rather the 15amp fuse below it and to the right of it are the ac clutch fuses. I checked all of them to be sure and they are all fine, no french fried fuses. As for the relay, couldnt really check that.
Now when trouble shooting the ac, when you hit the ac button there is no sound or engine hesitation when the ac clutch kicks in, so im guessing your absolutely right coby7, it is something with the ac clutch, but it does not appear to be the fuses (unless its the relay itself, which is possible). But other than that I'm dry on ideas here lol. I engaged the rear and front defrosters and the engine hesitated a tad (my guess is the voltage load on the engine made it skip for a second) but then returned to normal and was only blowing ambient air. I wish I could figure this one out lol, there is no DIC warning, no CEL, no nothing like that which is puzzling for the newer cars.
I was thinking it needed to be recharged, it does have 87k on the odometer, but if it needed to be recharged, the ac clutch would still kick in. So there went that idea.
Thank you all for the help by the way, its better than taking it into chevy for them to charge $60 to diagnose it lol.
---------- Post added at 03:15 PM ---------- Previous post was at 03:14 PM ----------
Maybe they forgot to re-connect the connector to the compressor when they removed the alternator.
Any way you can grab me a picture of the junction for this connector? aside from the astonishingly huge airbox i couldnt really see it. Thanks!