Onstar GMOS06 Installation Instructions

INSTALLING THE GMOS-06
1)With all connections completed to the aftermarket radio, plug the 32 pin harness into the Cadillac’s wiring harness.
*Note: some minor modifications may be necessary to the sub dash cavity to accommodate the GMOS-06.
2) Cycle the key by turning the ignition on then back off, then on again to test the radio.

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.

OS-2CTS Cadillac CTS/SRX Radio Replacement Installation Instructions

Step 1. Pre wire the RAD-18 wire harness to the aftermarket stereo wire harness. If the aftermarket stereo has a mute wire, cut the brown wire as close as possible to pin #16 of the RAD-18 harness and connect this mute output wire to the stereo’s mute wire. The amp remote wire (blue/white) must be connected to the stereo’s remote wire.
Step 2. Connect the black 16 pin and the red 20 pin harness to the factory radio harnesses. Connect the OS-CTS wire harness into the OS-2CTS interface.