I have a 03 Monte Carlo SS with 78,000 miles. Yesterday I turned on the ac and nothing happened. About 5 minutes later it suddenly started working. Today I turn on my car and nothing. I've tried throughout the day and still nothing. No heat or ac... No air at all coming from the vents at any setting or speed. I checked a few fuses and from the looks they are good, but I guess I'm not sure where the main one is that could be causing this? Possible the blower motor took a crap? Any help is appreciated.

 

Maybe these attached fuse box diagrams can help you.

 

Awesome... At least I know exactly what I'm looking at now and don't have to guess... I was looking for something like that. Thank you. Hopefully its as simple as just a fuse. Its way to hot to have the ac not working!

 

You are welcome.
Let us know how it all works out!!

 

Yea... Checked all fuses and everything looks good. When I switch it the air on u can here it like its kicking in and when I turn it off u can here it turn off... Just no air.

 

ewww sounds like the blower motor has gone south on you But I am not an expert by any means. Hopefully others will give their opinions.

 

Yea... That's what I'm pretty sure of. I know the blower motor resister has been known to have issues, but from what I have read it will normally still work on at least one of the speeds if that's bad..

 

sounds like blower motor or blower motor resistor.

 

From what I've read replacing either of those is a pain because the bolts are hard to get at.

 

Not sure as i've never done it on these cars, but i think its up in the passenger footwell.