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PAC RadioPro RP4-GM31

Radiopro4 Stereo Replacement Interface with Steering Wheel Controls for Select GM Vehicles with Canbus

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PAC RadioPro RP4-GM31

Radiopro4 Stereo Replacement Interface with Steering Wheel Controls for Select GM Vehicles with Canbus


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Product Features:

  • Radiopro4 PAC RP4-GM31 Stereo Replacement Interface
  • Navigation ready
    • Data controlled accessory and navigation outputs
  • Built in pre-programmed steering wheel control (SWC) retention
  • Retains factory amplifier
    • Note: In Premium Amplified Systems only two input channels can be used from the aftermarket radio, therefore there will be no fading capability of the aftermarket stereo.
  • Provides factory RSE activation
  • Retains warning chimes
  • Retains rear seat radio controls
  • Rear seat entertainment activation
  • Rear seat entertainment A/V ready
  • No programming required
  • Accessory 12-volt output
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Compatible Models

  • Buick
    • 2008-12 Enclave
    • 2006-11 Lucerne
  • Cadillac
    • 2006-11 DTS
    • 2007-13 Escalade
    • 2007-09 SRX
  • Chevrolet
    • 2007-13 Avalanche
    • 2007-08 Equinox
    • 2008-13 Exprees
    • 2006-13 Impala
    • 2006-07 Monte Carlo
    • 2007-13 Silverado
    • 2007-13 Suburban
    • 2007-13 Tahoe
    • 2009-12 Traverse
  • GMC
    • 2007-12 Arcadia
    • 2008-13 Savana
    • 2008-13 Sierra
    • 2007-13 Yukon
  • Hummer
    • 2008-09 H2
  • Pontiac
    • 2009-09 Torrent
  • Saturn
    • 2007-09 Outlook
    • 2008-09 Vue
  • Suzuki
    • 2007-09 XL-7

Compatibility Notes

  • Does not retain OnStar. For OnStar retention please use the PAC RadioPro RP5-GM31
  • 2012 Avalanche, Sierra, Silverado Suburban, Tahoe & Yukon vehicles equipped with a navigation radio are not compatible
  • Chevrolet Express vans & GMC Savannah vans equipped with diesel engines are not compatible
  • 2006 Lincoln Zephyr: Does not retain the THX amplifier

Harness Features

Main Harness Function
Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
Connect/Install an Aftermarket Car Stereo
Additional Harness Features
The various features that the wiring harness provides to your car stereo and/or audio system.
Chime Retention
Provides Parking Brake & Reverse Signals
Provides Vehicle Speed Sense
Retained Accessory Power (RAP) Retention
Retains Rear Seat Entertainment
Retains Steering Wheel Controls
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Buick Enclave
Buick Lucerne
Cadillac DTS
Cadillac Escalade
Cadillac SRX
Chevy Avalanche
Chevy Equinox
Chevy Express Van
Chevy Impala
Chevy Monte Carlo
Chevy Silverado
Chevy Suburban
Chevy Tahoe
Chevy Traverse
GMC Acadia
GMC Savana
GMC Sierra
GMC Yukon
Hummer H2
Pontiac Torrent
Saturn Outlook
Saturn Vue
Suzuki XL-7

Premium Harness Features

On-Star Compatible
This means that the harness is compatible with vehicles that have On-Star built-in.
Compatible with Aftermarket Navigation Systems
This means that the item is made to work with aftermarket systems with navigation. Typically, this means that the harness has wires that are used with GPS navigation systems, such as VSS wires and others. Please read the product description for full details of this feature.
Chime Retention
This means that the harness is able to retain the vehicles chimes.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Freehold, NJ

Works as advertised

October 13, 2014

Pros: Does all you need it to do. Small footprint. price is very good for this adapter type. Worked right of the bat with no problems. Tones are OK. This is what you want for GMC vehicles. Mine is a 2008 Silverado. Expect a few hours to install a radio correctly unless you have done it before.

Directions are slightly dicey. Wire colors and designations need to be reviewed and understood a bit before you cut and attach any wires.

13 of 16 found this helpful

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Columbus Ga

Worked like a charm but on gm

January 22, 2015

Make sure you get the correct harness-onstar or non-onstar. Sonic E was very easy to deal with on exchanges

12 of 15 found this helpful

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Leesville, LA

Verified Purchase
Probably the Best Out There

September 8, 2016

This interface does everything it says it will do, and does it well. It works with all the major brands out there, but for some of the lesser known/popular brands (Power Acoustik group), it's a crap-shoot. It didn't work well with a Soundstream head unit I originally had, but worked great with the Pioneer it was replaced with. The tones are a little cheesy, but I attribute that to the fact that the sounds come from the unit itself instead of reflecting them to the speakers like the factory head unit does. Installation was easy, and the directions were good. If you have problems, you can call PAC, and get a live person on the phone ready to help you.

0 of 0 found this helpful

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Browse 4 questions and 4 answers
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Why did you choose this?
Sonic Electronix Store
I need this to install my aftermarket stereo. Hopefully this is all I need.
sheldon t on May 23, 2016
suggested by you
jerry p on Oct 25, 2015
Will this work with onstar on my 10 Sierra?
A shopper on Jun 3, 2016
Best Answer: Hello,

As specified in the description, "Does not retain OnStar. For OnStar retention please use the PAC RadioPro RP5-GM31" .
Reply · Report · Rick MStaff on Jun 3, 2016
· Add Answer · I Have This Question Too (0)
Will this work for a 2005 Chevrolet Impala?
Sqwiggly L on May 31, 2015
Best Answer: Hello,

That vehicle is outside the specified compatibility list: 2006-13 Impala . Therefore, it will Not work.

Below is a link to the modules compatible with that vehicle. Choose the one that best fits the trim level and/or need of your install. Consult with your installer if need be, and plan accordingly.
Reply · Report · Rick MStaff on Jun 1, 2015
· Add Answer · I Have This Question Too (0)
Will this device connect to my factory back up camera?
sheldon t on May 23, 2016
· Add Answer · I Have This Question Too (0)

Product Summary


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Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: PAC RadioPro RP4-GM31