Originally Posted by HemiLonestar
OP, as you said nowadays it's usually a ground problem. I'd start with the engine grounds.
Engine grounds are good. Called a shop I took my truck to a couple of months ago and he confirmed what I had read on google where when the head unit becomes less grounded than it should, it seeks a ground through all avenues like speakers and even the antenna. He opted to have me check the grounding on the rear of the unit then if that isn’t the problem, look into installing an ground loop isolator.