Where to search for Electrical Gremlin?

[Capt_Caveman]

I have a 2004 Tahoe with a factory NAV radio out of a Hummer. The radio has been installed and working fine for 4+ years. Recently I had 3 quirky incidents with the radio. While driving along on a straight and (relatively) smooth road, the radio screen will flicker. (go blank, sound goes off then come back on)

On one of those occasions, the radio flickered twice and the Anti-Theft Activated message displayed. Of course nothing worked at the point. When I got to work, I turned the truck off and then restarted. The radio booted up fine with no problems.

I'm not real sure where to start looking. Anyone ever run across this type of issue?

Thanks

 

[Capt_Caveman]

bump.. Hoping someone has some suggestions

 

[08grey]

Start by pulling the radio and wiggle the wires at the radio and see if it's a local issue.