RadioPRO4 Interface for General Motors Vehicles with GM LAN 29 Bit Data bus

$239.00 RP4-GM31

LAN 29

  • 2012-2014 Avalanche, Sierra, Silverado Suburban, Tahoe & Yukon: vehicles equipped with a navigation radio are not compatible. These vehicles must use the RP4-GM32
  • Chevrolet Express vans & GMC Savannah vans equipped with diesel engines are not compatible
  • Does not retain OnStar. For OnStar retention please use the RP5-GM31
  • Premium Factory amplified Systems will not fade as neither the aftermarket radio or the RP interface have the ability to control the amplifier’s fader.
  • Does not retain escalating tones of parking sensor proximity
  • Does not retain lane departure or forward collision warning tones


RadioPRO4 Interface for General Motors Vehicles with GM LAN 29 Bit Data bus

Installation Instructions

It is VERY important that you use the latest version of Interface Updater. Not doing so may damage the interfaces software. 

Detailed Instructions

  • If this is the first time, download and install "PAC-UP Interface Updater". This will install the necessary software to update the firmware on the RP Interface. This can be found at in the "Download" tab at the very bottom of the firmware list on this page.
  • Download the firmware file to a location on your computer that you can easily find.
  • Open the Interface Updater Program by going to Start >All Programs >AAMP of America > Interface Updater.
  • Connect the PAC-UP to the computer using supplied USB cable. Connect the PAC-UP to the RP Interface.
  • Click the "Connect" button to establish connection between the PAC-UP and the computer. The "Connected" check box will be checked if successful. If unsuccessful, disconnect the PAC-UP from the computer, restart the software, then reconnect the PAC-UP and try again.
  • Select your RP Interface from the "Interface select" pull down menu.
  • Click "Update firmware". The new firmware can be found where you saved it before beginning.
  • Once the files are chosen the update will begin. When successful it will show the text "End Update".

IMPORTANT: It is very important that the second from last digit of the revision number on your module matches the second from last digit of the new firmware file revision number. If your numbers do not match, please contact our tech support department.

  • Firmware Download, Version 1.2.3a.8 (Released on February 13th, 2015)
    Release Notes
    • Separates Sony & Pioneer
    • Adds Alpine VR command
    • Fixes LED problem when using SWC
  • Firmware Download, Version 1.2.3a.4 (Released on May 29th, 2013)
    Release Notes
    • Fixes issues seen with SWC when used with new Alpine & JVC head units
    • Adds new Kenwood Bluetooth function support for SWC
  • Firmware Download, Version 1.1.2a (Released on December 21st, 2012)
    Release Notes
    • Improves chime tone and reliability of default SWC programming
  • Firmware Download, Version 1.1.1d (Released on April 13th, 2012)
    Release Notes
    • Resolves intermittent factory amp turn-on issue
  • Firmware Download, Version 1.1.1c (Released on April 5th, 2012)
    Release Notes
    • Initial release
  • Utility/Other, Version 2.6 (Released on July 21st, 2017)
    Release Notes
    PAC-UP Interface Updater

All in one radio replacement and SWC interface, the innovative RadioPRO4 comes pre-loaded with amplifier retention and SWC software, navigation based output signals, and other features that save time and money during installation.

  • Retains steering wheel controls (pre-programmed)
  • Data controlled accessory and navigation outputs
  • Retains factory amplifier
  • Rear seat audio and video (GMRVD) required
  • Retains back-up sensors/park assist
  • Provides factory RSE activation

Patent # 8,014,540 & 8,184,825

RP4-GM31 Instruction Manual
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