OEM GM Cadillac HD Radio Audio Amp Amplifier Control Module Replacement 84977626

This listing is for an OEM GM HD Radio Audio Amplifier.
I am not sure what GM models it fits for. Please go by the part number. 

Part Number: 84977626

Marked as used since Amplifier has cosmetic blemishes due to handling and storing. Item does not include original packaging, but will be shipped and packaged securely. Review the pictures and part numbers provided!​