2004 Chevy Silverado 2500HD I just bought the truck and the radio isn’t working. Everything lights up like it’s on but no sound. The salesman that sold it said it was working at one time and thinks it has something to do with the Onstar button. The manual says the Onstar button will mute the radio when pushed and to push any button to restore the radio. But it doesn’t work. Any ideas?
does the radio go through all of it’s functions normally if the buttons are pressed?