The radio in my 2002 GMC 2500HD 6L is stuck on mute. I can hear sound if I turn the volume all the way up. If I tune off the station I get full on static sound. It's like tuning mute function has got reversed. I have searched the internal for a solution and have pulled both fuses in the hope that it will reset. I don't have any message on the display, just looks normal. Question- can I swap out the radio with new non GM one that will fit in the hole? I know about the Theftlock feature for the radio but I just wanted to check and confirm that the truck will start and run with the GM radio removed. Thanks.