Axxess Stereos Installation Instructions

INSTALLATION INSTRUCTIONS FOR PART GMOS-10

GMOS-10

Cadillac Amplified OnStar Interface

2003-2006

APPLICATIONS

See inside front cover

KIT FEATURES

• Provides accessory (12 volt 10 amp)

• Retains R.A.P. (retained accessory power)

• Used in amplified systems

• Retains chimes

• Provides NAV outputs (parking brake, reverse, mute, V.S.S.)

• Retains OnStar/OE Bluetooth

• Adjustable volume for chimes and OnStar

• High level speaker input

• USB updatable

• Retains balance and fade

INTERFACE COMPONENTS

GMOS-10 interface •16-pin harness with stripped leads •14-pin harness to 16 and 20-pin harness with stripped leads

TOOLS REQUIRED

• Cutting tool • Crimping tool • Tape • Connectors

(example: butt-connectors, bell caps, etc.)

CAUTION: Metra recommends disconnecting the negative battery terminal before beginning any installation. All accessories, switches, and especially air bag indicator lights must be plugged in before reconnecting the battery or cycling the ignition.

NOTE: Refer to the instructions included with the aftermarket radio.

Applications

(Note: This interface will also work in vehicles listed below that are not equipped with Onstar)

CadillaC

CTS

SRX

2003-2006

2004-2006

(SRX with RPO codes U2R U2S)

GMOS-10

Connections to be made

From the 16-pin harness:

• Connect the Red wires to the ignition wire of the aftermarket radio.

• Connect the Orange/White wire is not used in this application.

• Connect the White wire to the left front positive speaker output of the aftermarket radio.

• Connect the White/Black wire to the left front negative speaker output of the aftermarket radio.

• Connect the Gray wire to the right front positive speaker output of the aftermarket radio.

• Connect the Gray/Black wire to the right front negative speaker output of the aftermarket radio.

• Connect the Green wire to the radio’s left rear positive speaker output.

• Connect the Green/Black wire to the radio’s left rear negative speaker output.

• Connect the Purple wire to the radio’s right rear positive speaker output.

• Connect the Purple/Black wire to the radio’s right rear negative speaker output.

• Connect the Blue/White wire to the radio’s amp turn on wire.

Connections to be made

• Connect the Brown wire to the mute wire of the aftermarket radio. If the aftermarket radio does not have a Mute wire, tape up the Brown wire.

• Connect the light Green wire to the parking brake wire of the aftermarket navigation radio.

• Connect the Blue/Pink wire to the VSS or speed sense wire of the aftermarket navigation radio.

• Connect the Green/Purple wire to the reverse wire of the aftermarket navigation radio.

• Plug the 16-pin harness into the GMOS-10.

GMOS-10

Installing the GMOS-10

• With all connections completed to the aftermarket radio, plug the 16 and 20-pin

GM harnesses into the vehicles wiring harnesses.

• Reconnect the negative battery terminal.

• Cycle the key, by turning the ignition on for 30 seconds. Then off and on again to test the radio.

From the 20-pin GM harness:

• Connect the Yellow wire to the radio’s 12 volt battery or memory wire.

• Connect the Black wire to the radio’s ground wire.

• Plug the 14-pin harness into the GMOS-10

The Black/Yellow wire is for the OnStar volume adjustment. This will be discussed in the OnStar Level Adjustment section of this instruction.

GMOS-10

Testing the GMOS-10

1) Turn the ignition on if not already, and then turn the radio on to verify that the radio works. Check balance and fader controls for proper operation.

2) Push the Onstar button (if equipped) to verify Onstar is working. The radio will shut off or mute, depending if the Brown wire on the 16-pin harness is connected, and Onstar will be heard through the front speakers. Turn off Onstar and the radio will turn back on.

3) With a small screwdriver adjust the potentiometer clockwise to raise the audio level and counterclockwise to lower the audio level.

4) Once at desired level your audio adjustment is complete.

Chime Volume adjustment

Please refer to your owner’s manual to adjust the chime level.

audio level adjustment

(Potentiometer located on 16-pin side of the interface)

1) Start your vehicle and turn on the radio having audio playing.

2) Turn your aftermarket radio’s volume up ¾ of the way.

OnStar level adjustment

To adjust the OnStar volume level find the Black/Yellow wire on the 16-pin harness.

Push the blue OnStar button, while the voice is speaking tap the Black/Yellow wire to ground.

There are 4 volume settings for OnStar; once the 4th setting is reached and the

Black/Yellow wire is tapped to ground it will automatically go back to the first volume setting.

Once the volume is set it will stay at that volume until the Black/Yellow wire is tapped to ground again. This can be set during installation and then left alone.

If user adjustment is desired, the customer may also tap volume up or down on the steering wheel (if equipped) to adjust the OnStar level.

Potentiometer

AXXESS ACCESSORIES STEREOS