In many Cadillac sedans the vehicle’s rear speakers are mounted in the rear deck of the car. While some models let you access the speakers by removing a grille or going in from the trunk, in many models you’ll need to remove the rear deck to get to the speakers. You can do this with a few basic tools.
Items you will need: Wrenches, Torx driver set, Screwdrivers, Panel tool
Pull up firmly on the front edge of the rear seat bottom cushion and lift the seat up. Remove the bottom cushion from the car.
Remove any bolts or nuts on the lower edge of the rear seat back cushion.