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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

Rev. 022516

Pacific Accessory Corporation

Introduction & Features

Important Notes

Wiring Connection Chart

Illustration / Schematic

The RP5-GM32 interface allows the replacement of a factory radio in select General Motors vehicles with 29-bit LAN 

radios.  Using this interface will retain factory features such as OnStar, steering wheel controls (SWC), warning chimes, 

Rear Seat Controls (RSC) and the BOSE amplifier when the original radio is removed.  Use of this interface also allows 

you to program two radio functions to each SWC button by using short press long press dual command functionality.  

The RP5-GM32 also provides data bus driven outputs such as retained accessory power (RAP), vehicle speed sensor 

(VSS), illumination, reverse trigger and parking brake.

1. 

The radio select rotary switch on the side of the interface must be adjusted to the proper radio setting before plugging the 

interface into the vehicle (see next page for setting chart).

2. 

The interface comes pre-programmed for all of the vehicles factory SWC functions and does not require programming unless 

you wish to re-assign the SWC functions or utilize short press long press dual command functionality. The SWC can always be 

restored to default settings by following the procedure outlined on page 3.

3. 

RSC buttons that are identical to the SWC will mimic the SWC one for one.

4. 

The LED will flash whenever a SWC button is pressed.

 Aftermarket Radio Connections

Yellow

B12v

Black

Ground

Red

Accessory Output

White

Front L + input

White / Black

Front L - input

Grey

Front R + input

Grey / Black

Front R - input

Green

Rear L + input

Green / Black

Rear L - input

Purple

Rear R + input

Purple / Black

Rear R - input

SWC Connector

Blue/Yellow

Kenwood, Newer 

JVC

3.5mm Jack

Alpine, JVC, 

Clarion, Pioneer, 

Sony, Fusion, Boyo, 

Dual, Lightning 

Audio, Visteon or 

Advent

SWC Connection

See above chart for 
different radio type 
connections

x3

Wiring

SWC Connection

Page 1

Aftermarket 

Radio 

Connections

Vehicle 

Connections

Light Green

Parking Brake 

Output (-)

Pink

Vehicle Speed 

Output 

Blue / White

Not Used

Blue

Not Used

Orange / White

Illumination Output 

(+)

Purple/White

Reverse Output (+)

Brown Loop

Mute Loop - See 

installation note 7

Pacific Accessory Corporation

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