I just had an aftermarket system installed in my 07 RC Silverado. It includes JL 6" door speakers, 4" alpine speakers in the rear panels powered by a 4 channel amp and a 13TW5 shallow mount subwoofer powered by a single channel amp all hooked up to a Kenwood DNX6980. The problem I've been running into lately is the passenger side rear speaker will cut out randomly. My first thought was when they wired the head unit into the steering wheel so i could use th esteering wheel buttons something got pinched. I'd take it back to the shop but that was in MS and I'm now in SoCal. Before I take it to a shop here I was wondering if anyone had any ideas that I could try.