The car is a 2005 TB EXT with 5.3L engine. All audio components are stock. No changes have been made. Last evening I was backing out of the garage when suddenly loud static blasted out of all of the speakers. It is intermittent. It does not matter whether the radio is on or off, the ignition is on or off, the engine is running or not. If the radio is on, I can hear program, voice or music, in the background. I pulled the battery ground to stop the noise. This morning I went to the BCM fuse block under the rear seat and pulled the radio fuse, #41. I put the battery ground back and started the car. All is normal except no radio and no clock. I wrote something similar last night on an old thread which you may see below. There was no resolution on this thread. Where do I go next? Thanks