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PAC RP5-GM51 Wiring Interface

Connect a new car stereo and retain steering wheel controls, safety warning chimes, and OnStar in select 2014-up GM vehicles

Item # 541RP5GM51

PAC's RP5-GM51 wiring interface lets you replace the factory radio in select 2014-up General Motors vehicles,...

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About the PAC RP5-GM51 Wiring Interface

PAC's RP5-GM51 wiring interface lets you replace the factory radio in select 2014-up General Motors vehicles, and still retain your factory warning chimes and your steering wheel audio controls. The interface also works with the OnStar system and the front/rear park assist. If you're installing a navigation receiver, this interface provides retained accessory power (RAP), vehicle speed sensor (VSS), and other crucial connections. Warranty: 1 year.

PAC's RP5-GM51 wiring interface lets you replace the factory radio in select 2014-up General Motors vehicles, and still retain your factory warning chimes and your steering wheel audio controls. The interface also works with the OnStar system and the front/rear park assist. If you're installing a navigation receiver, this interface provides retained accessory power (RAP), vehicle speed sensor (VSS), and other crucial connections. Warranty: 1 year.

Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this interface is compatible with your vehicle.

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What's in the box:

  • Radio replacement/SWC interface module (for GM LAN 29-bit databus)
  • Chime module
  • (CMX)
  • Vehicle harness (RP5-GM51-HAR)
  • Radio harness
  • SWC harness (4-pin connector to 3.5mm/blue wire)
  • Antenna adapter
  • Instructions

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More details on the PAC RP5-GM51 Wiring Interface

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Features

Radio Replacement Interface: The PAC RP5-GM51 interface allows an aftermarket head unit replacement of the factory navigation or non-navigation radio in select General Motors vehicles with 29-bit GM-LAN databus system. Using this interface will retain factory features such as OnStar, Park Assist, steering wheel controls (SWC), 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.

  • OnStar: 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.
  • Retained Accessory Power (R.A.P.): The ignition power source of many GM vehicles keeps the radio on until one of the doors is opened. This feature is called the R.A.P. (retained accessory power). The RP5-GM51 will retain this feature.
  • Warning Chimes: The PAC RP5-GM51 will retain your vehicle's factory warning chimes through the included external chime module.
  • Navigation Outputs: The PAC radio replacement interface provides a VSS (vehicle speed sense), Parking Brake, Mute, and a Reverse Gear output to make installing an aftermarket Navigation radio simpler and less time consuming.
  • Park Assist Retention: You get to keep your vehicle's factory front & rear park assist functionality. If you wish to retain the factory reverse camera you must solder an RCA end onto the factory backup camera signal wires.
  • Steering Wheel Control (SWC): The PAC radio replacement interface lets you keep your GM vehicle's OEM steering wheel controls (no additional adapter required, but some hardwiring in the vehicle's dash is required). You even get to program two radio functions to each SWC button by using short press long press dual command functionality.
  • Auxiliary Input: The PAC radio replacement interface also allows you to retain the factory AUX Input jack. The included set of RCA plugs will pass the audio from the factory input jack to your aftermarket radio. Note: The aftermarket radio must have an Aux or Audio input for this to work.
Note: This interface does not retain the vehicle's factory Bose audio system; you will need to bypass the Bose factory system. If the vehicle has a factory amplifier (Bose), the speaker wires of this interface will need to be extended and run to behind the vehicle's 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.

Vehicle Compatibility: The RadioPro4 (RP5-GM51) is compatible with select 2014-up GM vehicles fitted with a factory navigation or non-navigation radio, OnStar, and featuring the GM-LAN 29-bit databus system with 20-/16-pin connector harness.

Make Model Year
Chevrolet Colorado 2015
Silverado (1500 series) 2014
GMC
Sierra (1500 series) 2014

Radio Select Switch & Programmable SWC: 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. The interface comes pre-programmed for all of the vehicle's factory SWC functions and does not require programming, unless you wish to re-assign the SWC functions to different buttons (up to two commands per button). The SWC functions can be easily programmed; see control settings and functions below. The interface retains programming even if your vehicle's battery is disconnected.

Switch Position 1 2 3 4 5 6 7 8
Radio Alpine JVC Kenwood Clarion Valor OEM Dual Pioneer Sony Blaupunkt
Control Functions Volume +/- Volume +/- Volume +/- Volume +/- Volume +/- Volume +/- Volume +/- Volume +/- Volume +/- Volume +/-
Mute Mute Mute Mute Mute Mute Mute Mute Mute Mute
Source Source Source Source Source Source Source Source Source Source
Preset +/- Track +/- Play Search +/- Track +/- Track +/- Preset +/- Preset +/- Preset +/- Track +/-
Track +/- Band/Disc + Track +/- Band Cursor up/down Play/OK Track +/- Track +/- Track +/- Disc +/-
Power Preset/Disc - Disc/FM + Send OK Band Band Band Band OK
Play/Enter Select Disc/AM - End *** Cursor Up /Down *** Phone Menu *** ***
Band/Program Attenuation Answer *** *** Answer/ Hang-up *** Answer Call *** ***
Phone Receive /Reject Phone Receive /Reject Voice Dial *** *** *** *** End Call *** ***
End Voice Dial On/Off Hook *** *** *** *** Voice Activation *** ***
*** Power Mute *** *** *** *** *** *** ***
Note: The SWC harness contains a Blue/Yellow wire and a 3.5mm connector. You will only use one of the connectors, based on your type of aftermarket radio. The Blue/Yellow wire supports Kenwood, Newer JVC, OEM and Blaupunkt radios. The 3.5mm jack supports Alpine, Jensen, Older JVC, Clarion, Pioneer, Sony, Valor, and Dual radios. Not compatible with Soundstream head units.

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

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Ground
Blue Note Used
Blue/White Note Used
Orange/White Illumination
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Purple Right Rear Speaker +
Purple/Black Right Rear Speaker -
Light Green Parking Brake Detection (-)
Pink VSS Output
Purple/White Reverse Output (+)
Brown Mute

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

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
it was also recommended [ chris  Oct 12, 2018 ]
A
Because it's the only thing that would work with my truck that didn't cost over $200 [ Gary  Sep 05, 2018 ]
A
After speaking with the Crutchfield representative, he cleared up some things that I had questions about. It also came with the package being offered for the Alpine stereo I purchased. [ Michael  Feb 28, 2018 ]
A
Wanted the features to work [ Ape Rider  Dec 21, 2017 ]
A
Crutch-field as been right so far [ stephen  Dec 20, 2016 ]
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5 questions already asked

Q
Are these refurbished units? Do these come with any warranty?
[ phooji  Aug 01, 2016 ]
1 answer
A
Hi thanks for your question. The units are brand new. Crutchfield has a 60 day satisfaction guarantee. Beyond that or for comparison I would recommend reaching out to an Advisor directly by phone (1-800-324-9695) or online chat.
[ Kenny  Aug 01, 2016 ]  Staff
Q
Will I need a specific type of radio with the adapter to keep the steering wheel controls?
[ Toby  Jun 08, 2016 ]
1 answer
A
The ability to retain steering wheel controls with aftermarket receivers will be determined by the receiver you are using and the vehicle you have. For full information on this type of integration (including the parts you will need) please contact an Advisor by phone (1-800-324-9695) or online chat.
[ Krissy  Jun 08, 2016 ]  Staff
Q
When adding an aftermarket radio that has XM will i be able to hook up the factory XM to the aftermarket radio with this?
[ Richard  Mar 23, 2016 ]
1 answer
A
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 how it integrates and discuss the different options for your install.
[ Kenny  Mar 23, 2016 ]  Staff
Q
How do i know which adapter to use on my truck?
[ Jorge  Jan 07, 2015 ]
1 answer
A
For 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 if this will fit and what you will need for an installation in your vehicle.
[ Krissy  Jan 08, 2015 ]  Staff
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