GMRC-03 Cadillac Class II Data Bust Interface Installation Instructions

The GMRC-03 is designed to be used in Cadillac’s that do not have Onstar or amplified systems. It will retain the warning chimes that are lost when the factory radio is removed. The GMRC-03 will also provide a 12 volt switched accessory wire for proper radio operation. *Note: The GMRC-03 can be used in Cadillac’s that come with a factory amplifier; however the factory amplifier must be bypassed and the speaker wires on the GMRC-03 must not be used. Running new wires to the speakers is recommended. If the Cadillac also has Onstar, that feature will be lost.