my 2006 seirra left hand front door speaker doesn't work, and when it don't work the door chime with the key in the ignition also quits. the chime also doesn't work when the low fuel light comes on or when you don't put your seat belt on. every once in a while the chime will start to work and then the speaker will work. i have taken the door apart and all connections seem fine. i traced the wiring throught the dash and found no loose connections. are these two thing wired throught the bcm. do it have to replace the body control module. thanks pies.