Here's to hoping some of you can help without me having to spend a fortune with the dealer. I have a 2006 1500 Silverado LS2 trim package Crewcab with stock AF/FM CD player audio package. The chime system goes out along with the right door bass speaker intermittently. I have checked all connections for looseness and bad wiring and even pulled the speaker to see if it might have bad wires/connectors. Everything seems to be in good condition but everything goes in and out for no apparent reason. It is not related to rough roads or hitting holes/speed bumps. I only have an aftermarket maintenance book and it does not show any control module or anything that feeds any audio signal into or out of the radio such as a tone generator from a warning system for the doors, etc. Has anyone run into this before? I have used this forum to fix my clunking lower steering unit and my fuel tank vent box, so I know there are lots of smart and experienced people here.