Why is my Buick Enclave rear speakers not working?

The Buick Enclave rear speakers may not be working for many different reasons such as a blown fuse, short or corroded wiring, and it could be a radio receiver software issue. The first thing You should do is check the Audio settings to make sure the FADE isn't all the way to the front, essentially sending no signal to the rear channels. The rear speakers should all function on the same left and right rear channels. Possible You have problems with Your amp if all rear channels are off. Next, You can check out the short or corroded wiring and see if there are any disconnections. There may be speaker problems and that may be an issue if You need it to be replaced, the cost will range from $50 - $100 depending on the brand and quality.