envoy 08

I guess as they come in 3's this is number 2. The front right window does not go up and down correctly. The actuator comes on, but it seems like the glass may be off track or a component broken inside. I have not yet taken anything apart. Any ideas on where should begin? Thank you.

Trying to figure out if the factory radio is bad or if there is a fuse somewhere to check the speakers? 08 Envoy. For awhile the sound would come in and out, and now it just seems like its through the tweeter on the factory original. Any ideas or help is greatly appreciated. Darden