PAC Audio RP4-GM41 Specification Sheet

RP4-GM41

9

1

Pacific Accessory Corporation

Interface Connector
See above chart for
wire color descriptions.

Vehicle Connector
See above chart for
wire color description.

SWC Connection

x4

See above chart for
different radio type
connections

Acc On/
Programming
LED

Programming
Button

Radio Replacement & Steering Wheel Control Interface

for General Motors Vehicles

Introduction & Features

The RP4-GM41 interface allows the replacement of a factory radio in select General Motors vehicles with 29-bit LAN
v2 44-pin connector radios. Using this interface will retain factory features such as steering wheel controls (SWC) &

Warning Chimes 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 RP4-GM41 also provides data bus

driven outputs such as retained accessory power (RAP), vehicle speed sensor (VSS), illumination, reverse trigger and
parking brake.

Important Notes

1. Once the radio has been removed, the vehicle settings which are normally selected through the factory radio can be accessed by downloading

and installing the PAC Vehicle Settings program from http://www.pac-audio.com/rmware/RP/index.html. Please make your vehicle
settings selections before removing the factory radio for optimal installation time.

2. 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 below for setting chart).

3. 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 pressing and releasing the program button on the side of the interface once and waiting 7 seconds for the LED to ash 4 times.

4. The LED will ash whenever a SWC button is pressed.

5. BAADIN22 antenna adapter sold separately

Wiring Connection Chart

Interface Connector

Red / White Parking Brake

Output (-)

Purple / White Vehicle Speed

Output

Blue Not Used

Blue / White Not Used

Red Accessory Output

(1 amp)

Orange / White Illumination Output

(+)

Green Reverse Output (+)

Illustration / Schematic

Wiring SWC Connection

Vehicle Connector

Yellow Battery +12v

Black Ground

Blue/White Not Used

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

Red/White RCA Factory AUX Jack

SWC Connector

Blue/Yellow Kenwood, Newer

JVC, OEM or

Blaupunkt

3.5mm Jack Alpine, JVC,

Clarion, Fusion,

Pioneer, Sony,

Valor, Boyo, Dual,

Lightning Audio,

Visteon or Advent

Pacic Accessory Corporation® | Clearwater, Florida 33760 | Ph. 866-931-8021 | [e-mail]

©2015 Pacic Accessory Corporation

www.pac-audio.com

Rev. 012115

Page 1

RP4-GM41

Alpine JVC Kenwood ClarionValo

r

OEM Sony/PioneerFusion Blaupunkt

V

V

GM41

1

2

3

4

5

6

7

8

9

0

Radio Replacement & Steering Wheel Control Interface

for General Motors Vehicles

Installation Steps

SET RADIO SELECT SWITCH

Alpine JVC Kenwood Clarion Pioneer/Other Sony Fusion

1 2 3 4 7 8 9

Other = Advent, BOYO, Dual, Lightning Audio, Visteon,

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 3.

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

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

Default Steering Wheel Control Programming

IMPORTANT! 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 pressing and releasing the program button on the side of the interface once and waiting 7
seconds for the LED to ash 4 times.

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

Default SWC Button Assignments

olume + Volume + Volume + Volume + Volume + Volume + Volume + Volume + Volume + Volume +

olume - Volume - Volume - Volume - Volume - Volume - Volume - Volume - Volume - Volume -
Source Source Source Source Source Source Source Source Source Source
Track + Track + Track + Track + Search + Track + Next Track + Track + Track +
Track - Track - Track - Track - Search - Track - Previous Track - Track - Track -
Answer/Voice Receive Receive Receive Receive OK Receive Receive N/P OK
Mute Mute Mute Mute Mute Mute Mute Mute Mute Mute
End End End N/P End N/P End End N/P N/P

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 specic 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 ash off and on conrming 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 vehicles 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.

Pacic Accessory Corporation® | Clearwater, Florida 33760 | Ph. 866-931-8021 | [e-mail]

©2015 Pacic Accessory Corporation

www.pac-audio.com

Rev. 012115

Page 2

Optional Steering Wheel Control Programming (cont.)

Alpine JVC Kenwood Clarion Other* Pioneer Sony Fusion

1 Volume + Volume + Volume + Volume + Volume + Volume + Volume + Volume +
2 Volume - Volume - Volume - Volume - Volume - Volume - Volume - Volume ­3 Mute Mute Mute Mute Mute Mute Mute Mute
4 Preset + Source Source Source Preset + Preset + Preset + Source
5 Preset - Track + Play Search + Preset - Preset - Preset - Track +
6 Source Track - Track + Search - Source Source Source Track ­7 Track + Band/Disc + Track - Band Track + Track + Track + Audio
8 Track - Preset/Disc - Disc/FM + Send/End Track - Track - Track - Power
9 Power Select Disc/AM - Send Band Band Band

10 Enter/Play Attenuation Answer End N/A Phone Menu

Reject Call/Source

(Bluetooth equipped

radios only)

11 Band/Program Phone Receive Voice Dial Answer Call Answer/End Call
12 Receive Phone Reject On Hook End Call
13 End Voice Dial Off Hook VR

14 VR Power

Mute (Multimedia

units only)

15 Preset +

*Other = Advent, Boyo, Dual, Lightning Audio, Rockford Fosgate, & Visteon

Optional Programming Order

RP4-GM41

Radio Replacement & Steering Wheel Control Interface

for General Motors Vehicles

Programming

1. Turn the key to the ignition position.

2. Press and release programming button on the side of the interface.

3. Within 7 seconds, press the button that is to be learned on the steering wheel. The LED will turn off when the button is pressed.

At this point you have two options:

A. For short press functionality: Release the button within 1.5 seconds. The LED will turn back on.
B. For long press functionality: Hold the button until the LED starts blinking. Release the button and the LED will

go back to solid.

4. If you need to program more buttons, repeat step 3 for each additional audio function on the steering wheel.

5. 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.

6. Once programming is completed, wait seven seconds. The LED will ash three times indicating end of programming.

7. Test the interface for proper functionality. Whenever a SWC is pressed the LED on the interface should blink. If any function
does not work, repeat the programming steps

Testing & Verication

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.

3. Verify that all SWC are functioning properly.

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

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

Product Updates (Firmware)

The RP4-GM41 can be updated with new rmware as it becomes available using the PAC-UP interface updater (sold separately).
Please visit www.pac-audio.com/rmware for available updates.

Pacic Accessory Corporation® | Clearwater, Florida 33760 | Ph. 866-931-8021 | [e-mail]

©2015 Pacic Accessory Corporation

www.pac-audio.com

Rev. 012115

Page 3