I have an '05 LT and have been noticing an issue whenever I turn the A/C on. There seems to be a humming noise that gets louder as I accelerate, and it is more noticeable when it is hot out (80+ degrees).

The sound instantly goes away as soon as I turn the A/C off. A/C blows cold air with no problem as well so I'm not sure if it's a compressor issue?

Any help is appreciated!