RP5-GM51
RP5-GM51
Radio Replacement & Steering Wheel Control Interface
with OnStar Retention for General Motors Vehicles
Introduction & Features
The RP5-GM51 interface allows the replacement of a factory radio in select General Motors vehicles with 29-bit LAN v2 20 and 16 pin
connector radios. Using this interface will retain factory features such as OnStar, vehicle settings, steering wheel controls (SWC),
front and rear park assist and warning chimes when the original radio is removed. The RP5-GM51 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.Please make your vehicle settings selections before removing the factory radio for optimal installation time. Once the radio has been removed,
the vehicle settings which are normally selected through the factory radio can be accessed and changed by downloading and installing the
PAC Vehicle Settings program from http://www.pac-audio.com/firmware/RP/index.html.
2.The Voice button can be set to activate the factory OnStar function when pressed for longer than 1.5 seconds or given the ability to control
the aftermarket radio. This option can be found in the PAC Vehicle Settings program mentioned above in note one. The default setting for
these buttons is to control the factory OnStar. If these buttons are set to control the aftermarket radio, OnStar can still be accessed by using
the mirror controls.
3.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 page 2 for setting chart).
4.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, utilize the buttons that have no initial programming 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 flash 4 times.
5.The LED will flash whenever a SWC button is pressed.
Wiring Connection Chart
Aftermarket Radio Connections
Yellow
Battery +12v
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
Red / White
Parking Brake
Output (-)
Purple / White
Vehicle Speed Output
Blue / White
Not Used
Blue
Not Used
Orange / White
Illumination Output
(+)
Green
Reverse Output (+)
Brown Loop
Mute Loop
(See installation note 4.)
Illustration / Schematic
Wiring
Blu/Yel
Kenwwod or Newer
JVC
3.5mm Jack
Alpine, JVC,
Clarion, Pioneer,
Sony, Boyo, Dual,
Lightning Audio,
Visteon or Advent
x3
Vehicle Side Connections
Green/Black
SWC Connection
Aftermarket
Radio
Connections
Vehicle
Connections
SWC Connection
See above chart for
different radio type
connections
Pacific Accessory Corporation® | Santa Ana, California 92705 | Ph. 866-931-8021 | support@pac-audio.com
©2013 Pacific Accessory Corporation
www.pac-audio.com
Pacific Accessory Corporation
SWC Input
Rev. 102113
Page 1
RP5-GM51
Radio Replacement & Steering Wheel Control Interface
with OnStar Retention for General Motors Vehicles
Installation Steps
9 01
SET RADIO SELECT SWITCH
456
23
Alpine
JVC
Kenwood
Clarion
Pioneer/Other
Sony
Fusion
1
2
3
4
7
8
9
78
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 1.
3.Plug the CMX chime module in if 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 is activated. If the aftermarket radio has a mute input cut this loop
and connect the inside brown wire (next to the blue/white 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 on the next page.
7. If the vehicle has a factory amplifier (Bose) the speaker wires of the interface will need to be extended and run to behid the rear seat and
connected to the factory amplifier output wires. The amplifier is located at the bottom center of the rear wall of the vehicles cabin. (See below
for the factory wire colors that will be found at the amplifier)
a. If you wish to retain the steering wheel control buttons you must hardwire them into the RP5-GM51. The
wire you need to connect into can be found by removing the plastic panel located beneath the steering
wheel column and accessing the bundle of wires which houses the Green/Black wire (Fig. 1). Once you
have located the Green/Black wire in the vehicle you must connect the Green/Black wire coming from
the vehicle side connections of the interface to this wire. This is a data signal so to ensure consistent
operation please solder the wires together. DO NOT cut this wire in half.
b. If you wish to retain the factory reverse camera you must solder an RCA end onto the signal wires.
The wires you will need can be found at the Human Machine Interface Control Module (HMICM). This
module is located behind the lower glove box and can be accessed by removing the 4 - T15 bolts
securing the lower glove box to the dash. Once you have located the HMICM in the vehicle, locate the
12 pin connector on the far left (Fig 2.). If the vehicle has the base radio (RPO code IO3) the wires will
be in the 8 pin connector located at the radio brain. The wires you will need are located in pins 5 and 6
in either connector. Pin 6 - White/Blue - Camera Positive, Pin 5 - Grey/Yellow - Camera Negative.
Fig. 1
Fig. 2
Pin #
Wire Color
Description
Pin #
Wire Color
Description
1
Dk. Blue / Grey
Subwoofer +
4
Brown / Lt. Green
Right Front Tweeter + (UQA Only)
2
Yellow
Right Front Spk +
5
Yellow / Dk. Blue
Left Front Tweeter + (UQA Only)
3
Dk. Blue
Left Front Spk +
6
White
Right Rear Spk +
4
Red / Yellow
Constant +12V
7
Lt. Green
Left Rear Spk +
5
Grey / Black
Front L - input
12
Purple / Brown
Right Front Tweeter - (UQA Only)
6
Yellow / Black
Subwoofer -
13
Yellow / Grey
Left Front Tweeter - (UQA Only)
7
Brown / Dk. Blue
Left Front Spk -
14
Dk. Blue / Black
Right Rear Spk -
8
Black
Ground
15
Lt. Green / Black
Left Rear Spk -
Pacific Accessory Corporation® | Santa Ana, California 92705 | Ph. 866-931-8021 | support@pac-audio.com
©2013 Pacific Accessory Corporation
www.pac-audio.com
Pacific Accessory Corporation
Rev. 102113
Page 2
RP5-GM51
Radio Replacement & Steering Wheel Control Interface
with OnStar Retention for General Motors Vehicles
Default Steering Wheel Control Programming
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, utilize the buttons that have no initial programming 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 Voice 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 activate OnStar. When in the factory setting, only the short press function of this button can be reprogrammed. When in
the aftermarket setting, both the short press and long press function can be reprogrammed to whatever the customer chooses. This setting can
be changed via the Vehicle Settings program located at http://www.pac-audio.com/firmware/RP/RP5-GM51.html.
Default SWC Button Assignments
Volume +
Volume Track +
Track Voice
Phone
Up
Down
Left
Right
Check Mark
Alpine
Volume +
Volume Track +
Track Mute /
OnStar
Activation
End
N/P
N/P
N/P
N/P
N/P
JVC
Volume +
Volume Track +
Track -
Kenwood
Volume +
Volume Track +
Track Mute /
Mute / OnStar OnStar
Activation
Activation
Phone Reject On Hook
N/P
N/P
N/P
N/P
N/P
N/P
N/P
N/P
N/P
N/P
Clarion
Volume +
Volume Search +
Search Mute /
OnStar
Activation
End
N/P
N/P
N/P
N/P
N/P
Pioneer
Volume +
Volume Track +
Track Mute /
OnStar
Activation
End Call
N/P
N/P
N/P
N/P
N/P
Sony
Volume +
Volume Track +
Track Mute /
OnStar
Activation
Answer/End
N/P
N/P
N/P
N/P
N/P
Fusion
Volume +
Volume Track +
Track Mute /
OnStar
Activation
Audio
N/P
N/P
N/P
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 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.
Programming the SWC assignments
1. Turn the key to the ignition position.
2. Press and release the programming button on the side of the interface. The LED will turn on solid.
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 flash 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
IMPORTANT! The Up, Down, Left, Right and Check Mark buttons are capable of being programmed when using our module. Keep in mind
that the SWC could control the Driver Information Center (DIC) and the aftermarket radio at the same time depending on the mode that the DIC
is in. It is recommended to turn the aftermarket radio off when adjusting the DIC to avoid controlling both at the same time. The controls on the
back of the wheel, the Voice button and the Hang Up button will only control the aftermarket radio and not the DIC.
Pacific Accessory Corporation® | Santa Ana, California 92705 | Ph. 866-931-8021 | support@pac-audio.com
©2013 Pacific Accessory Corporation
www.pac-audio.com
Pacific Accessory Corporation
Rev. 102113
Page 3
RP5-GM51
Radio Replacement & Steering Wheel Control Interface
with OnStar Retention for General Motors Vehicles
Optional Steering Wheel Control Programming (cont.)
Optional Programming Order
Radio
1
2
3
4
5
6
7
8
9
Alpine
Volume +
Volume Mute
Preset +
Preset Source
Track +
Track Power
JVC
Volume +
Volume Mute
Source
Track +
Track Band/Disc +
Preset/Disc Select
Kenwood
Volume +
Volume Mute
Source
Play
Track +
Track Disc/FM +
Disc/AM -
Clarion
Volume +
Volume Mute
Source
Search +
Search Band
Send/End
Send
10
Enter/Play
Attenuation
Answer
End
11
12
13
Other*
Volume +
Volume Mute
Preset +
Preset Source
Track +
Track Band
Band/Program Phone Receive
Receive
Phone Reject
End
Voice Dial
Sony
Volume +
Volume Mute
Preset +
Preset Source
Track +
Track Band
Reject Call/Source
(Bluetooth equipped
radios only)
Answer/End Call
Voice Dial
On Hook
Off Hook
Mute (Multimedia
Power
units only)
*Other = Advent, Boyo, Dual, Lightning Audio, Rockford Fosgate, & Visteon
14
OnStar Volume Adjustment for Vehicles w/o SWC
1. If SWC buttons are not present you must use the
programming button on the interface to control the OnStar
audio level during an OnStar connection.
Pioneer
Volume +
Volume Mute
Preset +
Preset Source
Track +
Track Band
Fusion
Volume +
Volume Mute
Source
Track +
Track Audio
Power
Phone Menu
Answer Call
End Call
Voice Activation
x3
2. When OnStar is active pressing the programming button
will raise the audio level 10 times before returning to the
original level.
Press the programming button
on the side of the interface while
OnStar is active to adjust the
OnStar volume
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. If the vehicle has a factory amplifier the speaker wires will need to be run back and connected
to the factory amplifier output wires.
3. 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®. When
Onstar is activated, both the Voice and Phone buttons on the steering wheel will end OnStar.
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 or steering wheel then use the volume buttons on the SWC to adjust the level. If the vehicle is not equipped with steering
wheel controls you can use the SWC programming button to raise the volume of the OnStar. The volume will raise a total of 10 steps
SWC Connection
before returning to the lowest setting.
5. Turn off vehicle & remove key. RAP will be active & keep the radio on for 10 minutes or until the drivers door is opened.
6. The LED & radio will turn off when RAP turns off or the drivers door is opened.
Product Updates (Firmware)
The RP5-GM51 can be updated with new firmware as it becomes available using the PAC-UP interface updater (sold seperately). Please visit
www.pac-audio.com/firmware for available updates.
Pacific Accessory Corporation® | Santa Ana, California 92705 | Ph. 866-931-8021 | support@pac-audio.com
©2013 Pacific Accessory Corporation
www.pac-audio.com
Pacific Accessory Corporation
See above cha
different radio
connections
Rev. 102113
Page 4
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