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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

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  • PAC RP5-GM51 Wiring Interface

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  • PAC RP5-GM51 Wiring Interface

  • PAC RP5-GM51 Wiring Interface

  • PAC RP5-GM51 Wiring Interface

  • PAC RP5-GM51 Wiring Interface

  • PAC RP5-GM51 Wiring Interface

  • PAC RP5-GM51 Wiring Interface

 

Our take on the PAC RP5-GM51 Wiring Interface

by Bob Bihlmayer
PAC

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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Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information.

Hands-on research from the Crutchfield Labs (what are the Labs?)

Product Research
What's in the box?

Download owner's manual

  • 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

Our Product Research Team

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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 also 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.
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. Compatible vehicles as of 4/15/2014 include:

Make Model Year
Chevrolet Silverado (1500 series) 2014
GMC
Sierra (1500 series) 2014
Note: As always, please consult Crutchfield's Outfit My Car to see if your vehicle is compatible. Click here for the most up-to-date list of compatible vehicles.

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, 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 Power Antenna
Blue/White Amp Turn On
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 -
Red/White Parking Brake Detection (-)
Purple/White VSS Output
Green Reverse Output (+)
Brown Mute
 
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For a more in-depth review and enhanced detailed information on the PAC RP5-GM51 Wiring Interface, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_541RP5GM51/PAC-RP5-GM51-Wiring-Interface.html ).

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