Exhaust smell

Check your exhaust system for leaks. Under the hood,under the vehicle.

I don't smell anything when there are no other cars around. Wouldn't I smell it all the time if it was my exhaust?

Depends, If your ac is only cooling and circulating inside air. You shouldn't smell anything. The air on, somewhat pressurizes the cabin area.

With alot of cars around, the exhausts of several vehicles may not dissipate as quickly.

Thanks, since I won't be using the air much the rest of this year I will wait till spring and have someone really check it out. It is just strange that it started doing this out of the blue. I did just have the oil changed and a major tune up. I noticed it doing it after that but was told it would of had nothing to do with the issue. I have had this truck 12 years and it has been a good truck. If I can't resolve this either I won't have air in the summer or I will have to think about getting rid of it. Hate the thought of car payments again!

I know what you mean about car payments. My old car is paid for, I just hope it holds together.