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PAC RP5-GM31 Wiring Interface

Connect a new car stereo and retain OnStar®, factory amp, Bluetooth®, and steering wheel audio controls in select 2006-up GM models

Item # 541RP5GM31

PAC's RP5-GM31 wiring interface enables you to install a new car stereo and retain useful factory functions in...

Read more from Crutchfield writer, Bob B.

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About the PAC RP5-GM31 Wiring Interface

Keep your factory features

PAC's RP5-GM31 wiring interface enables you to install a new car stereo and retain useful factory functions in select 2006-up General Motors vehicles. You can upgrade to the higher sound quality of an aftermarket receiver while maintaining your factory-installed OnStar®, backup cam, amplifier, Bluetooth®, safety warning chimes, Retained Accessory Power (RAP), and rear seat controls. If your vehicle has steering wheel controls and a driver info center, you'll also be able to retain the use of your factory satellite radio tuner.

Keep your factory features

PAC's RP5-GM31 wiring interface enables you to install a new car stereo and retain useful factory functions in select 2006-up General Motors vehicles. You can upgrade to the higher sound quality of an aftermarket receiver while maintaining your factory-installed OnStar®, backup cam, amplifier, Bluetooth®, safety warning chimes, Retained Accessory Power (RAP), and rear seat controls. If your vehicle has steering wheel controls and a driver info center, you'll also be able to retain the use of your factory satellite radio tuner.

Control your new radio

This interface retains the use of your factory steering wheel audio controls with your new car stereo. The interface comes pre-programmed with the factory control functions, or you can reassign the functions of your factory buttons, or even assign two functions to each of your factory buttons. If you're installing a navigation receiver, this interface also features the Vehicle Speed Sensor (VSS), parking brake, and reverse connections you need.

This interface works with aftermarket radios from Kenwood, Alpine, JVC, Clarion, Pioneer, Sony, Fusion, Boyo, Dual, Lightning Audio, Visteon and Advent.

Installation note: This interface will not retain the fader controls on vehicles with the factory premium Bose® audio system.


Product highlights:

  • works with amplified and non-amplified systems (including Bose audio systems)
  • retains factory steering wheel audio controls (allows dual function for each button)
  • retains factory Bluetooth if equipped (2009-up vehicles)
  • retains factory OnStar if equipped
  • retains Rear Seat Controls, factory backup cam, Rear Seat Entertainment system (with optional adapter)
  • retains satellite radio in vehicles with steering wheel controls and a driver info center
  • provides Vehicle Speed Sensor (VSS), parking brake, and reverse connections for installing a navigation receiver
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # RP5-GM31

What's in the box:

  • Radio replacement/SWC interface module (for GM LAN 29-bit data-bus)
  • CMX chime module
  • Vehicle harness
  • Radio harness
  • Camera/Center/Sub harness
  • SWC harness
  • Antenna adapter
  • Installation Instructions

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More details on the PAC RP5-GM31 Wiring Interface

Product Research


Radio Replacement Interface: The PAC RP5-GM31 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), factory Satellite Radio and the Bose amplifier when the original radio is removed. The RP5-GM31 also provides data bus driven outputs such as retained accessory power (RAP), vehicle speed sensor (VSS), illumination, reverse trigger and parking brake.

Vehicle Compatibility: The RadioPro4 (RP5-GM31) is compatible with the following 2006-2015 GM vehicles equipped with a factory GM LAN 29-bit Data-bus radio.

Make Model Year
Buick Enclave 2008-2015
Lucerne 2006-2011
Cadillac DTS 2006-2010
Escalade 2007-2014
SRX 2007-2009
Chevrolet Avalanche 2008-2013
Equinox 2007-2009
Express 2008-2013
Impala 2007-2013
Monte Carlo 2006-2007
Silverado 2007-2014
Suburban 2007-2014
Tahoe 2007-2014
Traverse 2009-2017
GMC Acadia 2007-2015
Savana 2008-2013
Sierra 2007-2014
Yukon 2007-2014
Hummer H2 2008-2009
Pontiac Torrent 2007-2009
Saturn Outlook 2007-2010
Vue 2008-2010
Suzuki XL-7 2007-2008


  • Chevrolet Express vans & GMC Savannah vans equipped with diesel engines are not compatible.
  • In 2014-up Silverado and Sierra trucks, only compatible with 2500 & 3500 series trucks with non-navigation radios. 1500 series must use the RP5-GM51 (541RP5GM51, sold separately).
  • 2012-up GM trucks and SUVs equipped with factory navigation radios require the RP5-GM32 (541RP5GM32, sold separately).

Amplified or Non-Amplified Systems: The PAC RP5-GM31 can be used in GM vehicles with or without a factory amplified system. Its compatible with Bose, non-Bose, and Y-91 audio systems. In Premium Amplified Systems (Y-91) there will be no fading capability of the aftermarket stereo. Factory sub and center channel will be retained, if your aftermarket head unit its equipped with front & sub preouts. 

OnStar & Bluetooth: This radio replacement interface is designed to retain the factory OnStar emergency services system and turn-by-turn voice prompts that would normally be lost when your factory radio is replaced by an aftermarket head unit. The interface also lets you keep your vehicle's factory installed Bluetooth (2009+ model vehicles with OnStar only).

Steering Wheel Control (SWC): The PAC radio replacement interface lets you keep your GM vehicle's factory steering wheel controls (no additional adapter required). You even get to program two radio functions to each SWC button by using short press long press dual command functionality.

Factory Satellite Radio: The PAC RP5-GM31 allows you to retain your vehicle's factory Satellite Radio tuner with continued text display on the vehicle's factory driver information center (cluster display). In order to retain the factory Satellite Radio tuner, the vehicle must be equipped with steering wheel controls and a driver information center. Your aftermarket head unit must also be equipped with a rear-panel auxiliary input.

Note: The RP5-GM31 is equipped with stereo RCA outputs, so if your radio is not equipped with a stereo RCA aux input but a 3.5mm aux input,  you'll need a stereo RCA-to-minijack adapter (such as the 979YRA154, sold separately).

Backup Camera & Sensor Retention: The interface also retains your vehicle's factory back-up camera; the included camera harness plugs into the composite video camera input on the back of your aftermarket head unit. In addition, you get to keep your vehicle's factory back-up sensor/park assist functionality.

RSE /RSC + Dual Zone: The PAC RP5-GM31 lets you retain the vehicle's factory rear seat controls (RSC) and rear seat entertainment (RSE) for Dual Zone capability with your aftermarket stereo. In order to retain rear seat entertainment (RSE), you will also need the PAC's GMRVD retention harness (127GMRVD, sold separately).

Retained Accessory Power (R.A.P.): The ignition power source of most GM vehicles keeps the radio on until one of the doors is opened; this feature is lost when replacing the factory radio with an aftermarket head unit without the proper installation accessories. The RP5-GM31 is designed to retain the R.A.P. feature and keep the radio powered after the key is off, until the driver door is opened or the factory timer ends; whichever happens first.

Warning Chimes & Messages: The PAC RP5-GM31 retains factory warning & safety chimes via the included chime module. It also retains the vehicle's factory lane departure warning system.

Navigation Outputs: The PAC RP5-GM31 radio replacement interface module provides a VSS (vehicle speed sense), Parking Brake, and a Reverse Gear output to make installing an aftermarket navigation receiver simpler and less time consuming.

Wiring Connection Chart: The included wiring harness features the following hardwire connections.

Wire Color Function Pin #
Red +12 Volt Accessory 21
Yellow +12 Volt Constant 11
Black Ground 22
Blue Note Used 17
Blue/White Amp Turn On 18
Orange/White Illumination 16
White Left Front Speaker + 6
White/Black Left Front Speaker - 9
Gray Right Front Speaker + 7
Gray/Black Right Front Speaker - 8
Green Left Rear Speaker + 2
Green/Black Left Rear Speaker - 4
Purple Right Rear Speaker + 3
Purple/Black Right Rear Speaker - 5
Light Green Parking Brake Detection (-) 15
Pink VSS Output 13
Purple/White Reverse Output (+) 14
Brown Loop Mute 19, 20

RadioPRO App: PAC offers a Windows compatible RadioPRO App software program to help you configure the interface.

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Customer Q&A

Crutchfield asked: Why did you buy this?
they were included in the install package I selected. [ Dwain  Feb 15, 2019 ]
Retaining factory steering wheel controls is important for easy accessibility [ Paul Nathan  Jan 20, 2019 ]
To make instillation of stereo painless.. [ Bradley  Jan 14, 2019 ]
Ease of install [ Kathi  Jan 05, 2019 ]
A must item to prevent any cutting or splicing of the factory wire harness; just plug and play install. [ george  Jan 03, 2019 ]
Recommended and need the connection for the steering wheel controls. [ Diane  Dec 17, 2018 ]
Part of the recommended car stereo installation kit. I wanted to make sure i kept as many of the factory installed options as possible [ Ben  Nov 26, 2018 ]
don't want to lose any factory controls in steering wheel [ Matthew  Nov 16, 2018 ]
Ease of install and factory functions. [ Edward  Oct 17, 2018 ]
wanted to keep steering wheel controls [ Harold  Oct 14, 2018 ]
Of all the options, this kit retained the most functions of my stock set-up. [ Megan  Sep 17, 2018 ]
specific for my vehicle and referred to me by advisor Hogan and it save me $50 [ robert  Aug 14, 2018 ]
it seems required [ HYO  Jul 23, 2018 ]
I have always heard great things about Crutchfield & It was recommended I go with all suggestions to serve me best! [ Deborah  Jul 14, 2018 ]
dank [ DULCE  Jun 21, 2018 ]
I want to keep all of the cars built in options steering wheel controls, other bells and whistles [ akblais  Jun 08, 2018 ]
This was the best option for my vehicle for retaining all factory functionality. [ David  May 02, 2018 ]
Need it [ Shawn  Apr 30, 2018 ]
To keep options [ Oscar  Apr 28, 2018 ]
Need to install, for optima performance. [ Gerald  Feb 25, 2018 ]
This item is fit specific for my vehicle to allow for retention of factory OnStar, XM, chimes, accessory power and steering wheel controls. [ F Eugene  Feb 20, 2018 ]
I choose the interface to keep the steering wheel stereo controls. [ KENNETH  Feb 08, 2018 ]
Bought prior an worked great [ Maureen  Dec 26, 2017 ]
needed for install [ James  Dec 07, 2017 ]
Crutchfield said it fits my 2011 Avalanche [ vernon  Nov 05, 2017 ]
Installer said this is the harness needed - looked on the web - cruthfield had the same part cheaper that other web sites that ranged from $129 t $279. [ Richard  Oct 31, 2017 ]
It fits my truck [ Charles  Sep 16, 2017 ]
Same [ Zachary  Sep 04, 2017 ]
Recommended for my vehicle and would match my already satellite radio installed factory in the vehicle [ Mitch  Aug 10, 2017 ]
Great parts for awesome price!... [ Asael  Jul 21, 2017 ]
Chose this to keep factory amp [ Corey  Jun 24, 2017 ]
I chose this install kit because it retains the most functionality of my trucks features all in one package [ James  Jun 06, 2017 ]
I need it to run my double din pioneer for my 2007 gmc sierra. [ Kyle  Mar 06, 2017 ]

5 questions already asked

I was given a kids no name radio and I was curious if this will work with any brand or just the bigger name brand units?
[ Doug  Feb 12, 2019 ]
1 answer
Should work with any radio but it's specifically for Impala with onStar I believe.
[ Brandon  Feb 12, 2019 ]
I have the this harness/interface and I'm using the kenwood ddx375bt radio how do I retain my xm radio tuner? I do have steering wheel controls and the dic. Truck is a 2011 Silverado.
[ Paul  May 28, 2018 ]
1 answer
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you.
[ Krissy  Jun 05, 2018 ]  Staff
What number setting for Boss radio?
[ Michelle  Nov 05, 2017 ]
1 answer
I had mine installed at a radio shop
[ mark  Nov 06, 2017 ]
I have a 2012 impala with bose amp. My kenwood i want to install has front/rear/sub rca outputs. The instuction say if u have bose to connect the rp5 rca's to center/ sub outputs. I don't have center but have sub on the kenwood. Do i use these rca's? or not at all?
[ frank ferro  Sep 20, 2017 ]
1 answer
For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on how everything connects and what you will need for an installation in your vehicle.
[ Kenny  Sep 20, 2017 ]  Staff
Does this interface also retain the factory rear DVD monitor?
[ E  Feb 27, 2017 ]
1 answer
It can retain the rear seat entertainment system when used with the right type of radio and installed with the GMRVD adapter: I recommend contacting an advisor on 1-800-324-9695 to check your aftermarket radio and your vehicle to see if it will work for your setup. My Bio:
[ Paul  Mar 12, 2017 ]  Staff

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