on the note of complicated chimes. a few years back i had bought a brand new 03 Sierra 1500. Drove it down to the car toys and had a new deck installed. never really paid attention that my chime never worked after that. then when i was selling it, i put the stock deck back, i had the door open when i did this. as i plugged the deck in, my truck started chiming at me, about scared the hell out of me.