Ok this one got me confused. Yesteday I got in the truck for work and left speaker had no audio in door except the tweeter. doesn't cut in or out, no popping or crackling like a blown speaker would do. I left work and got in truck and the speaker was working fine.

So I thought ok maybe I will keep an eye on it. got in the truck this morning and again no sound as if someone unplugged the speaker. Tweeter still going during all this.
I have read others having this issue with no resolution. Some have replaced the head unit and still having problems. Seen speakers replaced and yet still a problem.

Any Ideas? anyone no a real solution to what seems to be somewhat common problem?

07 Silverado Classic 5.3L Z71 4x4