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RP5-GM41

Radio Replacement & Steering Wheel Control Interface 

with OnStar Retention for General Motors Vehicles

Pacific Accessory Corporation

Page 2

Installation Steps

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.

2. Make all connections as described in the chart on page 1.

3. Plug the CMX chime module in if necessary (If the vehicle chimes when the radio is removed the CMX is not necessary).

PLEASE NOTE:

 In order to get the best possible sound out of the CMX please mount it in a place free and clear of any

obstructions, preferably as close as possible to the bottom of the dash pointing down toward the floor of the vehicle

4. The Mute loop (if not cut) will turn the accessory output off when an OnStar or Bluetooth call is made or received.  If the

aftermarket radio has a mute input cut this loop and connect the outer brown wire to the mute input.

5. Connect the SWC wire according to the chart on page 1 (aftermarket radio MUST support a wired remote input).

6. If you wish to reassign functions to the SWC follow the programming instructions in the next section.

7. The reverse camera wires could be in one of two places depending on the model and trim of the vehicle. If the aftermarket

radio is switching over when the vehicle is placed into reverse and you are not getting the camera to display properly, try using

the other yellow RCA provided.

IMPORTANT! 

The interface comes pre-programmed for the functions listed in the chart below 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 pressing  the program button on the side of the interface once and waiting for the timeout.
The Mute/End button has two functions. Pressing this button for less than 1.5 seconds will initiate the mute command. Pressing 

this button for more than 1.5 seconds will initiate the end command. This dual function button can also be reprogrammed to 

whatever features the customer chooses.

Alpine

JVC

Kenwood

Clarion

Pioneer

Sony

Fusion

Volume -

Volume -

Volume -

Volume -

Volume -

Volume -

Volume -

Volume -

Source

Source

Source

Source

Source

Source

Source

Source

Track +

Track +

Track +

Track +

Track +

Track +

Track +

Track -

Track -

Track -

Track -

Search -

Track -

Track -

Track -

Answer/Voice

Answer/OnStar

Activation

Answer/OnStar

Activation

Answer/OnStar

Activation

Answer/OnStar

Activation

Answer/OnStar

Activation

Answer/OnStar

Activation

Answer/OnStar

Activation

Mute/End

Mute/Factory

Bluetooth End

Mute/Factory

Bluetooth End

Mute/Factory

Bluetooth End

Mute/Factory

Bluetooth End

Mute/Factory

Bluetooth End

Mute/Factory

Bluetooth End

Mute/Factory

Bluetooth End

Default SWC Button Assignments

1 2

3 4 5

 6

78

Other = 

Advent, BOYO, Dual, Jensen Lightning Audio, Rockford Fosgate & Visteon

SET RADIO SELECT SWITCH

Alpine

JVC

Kenwood

Clarion

Pioneer/Other

Sony

Fusion

1

2

3

4

7

8

9

Default Steering Wheel Control Programming

Optional Steering Wheel Control Programming

If you wish to re-assign the SWC functions, utilize the buttons that have no initial programming, or utilize short press long press 

dual command functionality, the interface must be programmed in the specific order shown in the chart below. If you come across 

a function in the chart that your steering wheel does not have, or you do not want to program, press and release the program 

button on the side of the interface to skip that function. The LED will flash off and on confirming that you have successfully skipped 

that function and are ready to proceed to the next one.

Short Press Long Press Dual Command Functionality

This feature allows you to assign two aftermarket radio functions to each of the vehicle’s SWC buttons. It can be used with as 

many of the buttons as the user likes or none at all. When this functionality is implemented, quickly pressing and releasing a SWC 

button will initiate the short press command, while pressing and holding a SWC button for longer than two seconds will initiate the 

long press command. Please note that no long press commands are programmed by default. If you wish to assign dual command 

functionality to the SWC please follow the programming steps on the next page.

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