My Monte Carlo has been in the shop for the last month getting its transmission rebuilt, and also getting the brakes and neutral safety switch replaced. I got it back yesterday, it runs like a champ, but for whatever reason I can only hear my FM radio when I have it all the way turned up, and even then it’s extremely quiet. The AM radio works just fine, and the CD player works just fine, so it’s not the speakers and I don’t think it’s the amp. I have no idea what the issue could be, if anyone’s experienced something similar any kind of help would be greatly appreciated. Thank you!

 

I was going to say the amp. I do know when the amp goes the radio doesn’t work.

 

All audio sources are fine except the FM radio? If that is the case, I have no idea.

 

Possibly they didn't seat the antenna cable properly in the head unit when replacing the safety switch. I think FM is more dependent on a complete connection than AM.