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RP5-GM32

Radio Replacement & Steering Wheel Control Interface 

with OnStar Retention for General Motors Vehicles

Pacific Accessory Corporation

®

 | Ph. 866-931-8021 | [email protected] 

©2016 Pacific Accessory Corporation

www.pac-audio.com

Pacific Accessory Corporation

Rev. 022516

Testing & Verification

1. 

Turn  the ignition on. The LED on the interface will turn on & the +12v accessory wire will turn on.

2. 

Turn on the radio & check balance & fade. Note: 

Premium Factory amplified Systems

 will not fade as neither the 

aftermarket radio or the RP interface have the ability to control the amplifier’s fader.

3. 

Verify that the factory subwoofer (if present) is playing

4. 

Verify that all SWC are functioning properly for both the aftermarket radio and OnStar. To adjust OnStar volume, press the 

OnStar button on the mirror then use the volume buttons on the SWC to adjust the level. The volume will raise a total of 8 

times before returning to the original level.

5. 

Pressing the OnStar® button on the rearview mirror will turn off the rear speakers and allow the OnStar® audio to be heard 

in the two front speakers. The OnStar® active LED will also turn on. When OnStar® disconnects, the radio will un-mute or 

turn back on and the OnStar® LED will turn off. Pressing the Mute/OnStar® button on the steering wheel for 1.5 seconds 

will also activate Onstar®.

6. 

Turn off vehicle & remove key. RAP will be active & keep the radio on for 10 minutes or until the drivers door is opened.

7. 

The LED & radio will turn off when RAP turns off or the drivers door is opened.

8. 

Use the 4 position selector switch located on the side of the CMX module to select the best chime output volume for your 
specific installation. Setting 1 being loudest and 4 softest.

Page 4

Using the Radios Dual Zone Source

1. Press the power button to turn the RSE Controls on. When Radio is displayed on the RSE Controls, the aftermarket radios rear 

    speaker output will be heard through the headphone jacks. Putting the aftermarket radio into dual zone mode should change 

    the output level of the rear speakers to a fixed level. This allows precise user adjustment from the level knobs on the RSE 

    Controls (refer to aftermarket radio owners manual for model specific dual zone operation).

2. The seek arrows and PROG button will control the radio as programmed by the SWC interface. These buttons are mapped to 

    the SWC buttons as stated above.

3. Pressing the power button will turn the RSE Controls off as well as turning the key off. The seek arrows and PROG button will 

    continue to operate as stated (with the exception of SRCE which has no function) when the Rear Seat Controls are turned off.

Turns the

Rear Seat

 Controls On

or Off

Change between

Factory XM tuner 

and Dual Zone

Radio Source

Controls the

Radio as

Programmed

by the SWC

interface (Mapped

to the Arrow

and Bar Button)

Controls the

Radio as

Programmed

by the SWC

interface (Mapped

to the Arrow

Down Button)

Controls the

Radio as

Programmed

by the SWC

interface (Mapped

to the Arrow

Up Button)

Radio

Using Rear Seat Audio Controls

CMX

chime module

1

4

2

3

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