Sounds like something is loose in the display on the dash or something on the display circuit, which would be in the dash. I have the same car and the radio and gages are controlled separately. It must be something at the display end of the circuit if everything on the display is malfunctioning. Sorry I can't help more, try and get a schematic for it at a GM dealer, they can provide them.
Friday, February 2nd, 2007 AT 12:41 PM