Where is the Bose amp on a 1989 Cadillac eldorado?

The Bose amplifier in a 1989 Cadillac Eldorado is typically located in the trunk (rear of the car), often under the carpeting or in a compartment. It's not always in the same exact spot, so you might need to do some careful searching. Look for a relatively large rectangular box with wiring harnesses connected to it. It's usually fairly well-hidden.