Certain Cadillacs come fitted with Bose audio systems. For example, older versions of the Cadillac STS has a Bose 4.0 audio system, newer versions have the Bose 5.1 system. The Cadillac SRX also comes fitted with an integrated Bose audio system. The numeric denotation in the name of the audio system refers to the type of surround-sound used in the system. The amplifiers are fundamentally the same in terms of design. If you are experiencing diminished audio playback, your amplifier might need repairs.
Items you will need: User’s Manual, Electrical tape, Cross-head screwdriver, Volt meter
Troubleshoot the audio system. To ensure that the amplifier is the cause of the problem, turn on the ignition and send an audio signal to the amplifier, either by playing a CD or switching on the radio.