Diagnostic Aids

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

When equipped with the UQA amplifier, DTCs may be set by the radio for the audio outputs to the amplifier; or by the amplifier, for the audio outputs to the speakers.
When equipped with the UQ3 amplifier, only the radio sets DTCs for the audio outputs to the amplifier.