RadioPRO Advanced Interface for General Motors Vehicles

$309.00 GM3A-RSTX
Radio Installation Adapter For Select General Motors Vehicles With OnStar, GM LAN 29-Bit Data-bus with 14-pin and 16-pin harnesses
  • 2012+ GM trucks and SUVs equipped with factory navigation radios require the RP5-GM32
  • 2014+ Silverado and Sierra: Only compatible with 2500 & 3500 series trucks with non-navigation radios. 1500 series must use the RP5-GM51. 2500 & 3500 series trucks with navigation radios must use the RP5-GM32
  • In Premium Amplified Systems there will be no fading capability of the aftermarket stereo.
  • Chevrolet Express vans & GMC Savannah vans equipped with diesel engines are not compatible
  • In order to retain the factory XM tuner the aftermarket head unit MUST be equipped with an auxiliary input
  • In order to retain the factory XM tuner the vehicle must be equipped with steering wheel controls and a driver information center
  • Does not retain escalating tones of parking sensor proximity
  • Does not retain lane departure or forward collision warning tones


RadioPRO Advanced Interface for General Motors Vehicles

  • Firmware Download, Version (Released on April 22nd, 2022)
    Release Notes

    ***No download available, hardware update only***

    • Changed GM3A-RSTX to new hardware platform (black housing). Includes the following improvements:
      • 10a Accessory Output through onboard relay
      • Direct USB connectivity
      • Retains fader in Y91 Premium Bose systems
  • Firmware Download, Version (Released on July 1st, 2019)
    Release Notes
    • Changed RP5RADPWRAUDIO-HAR to GM-RAD-HAR. Harness includes the following updates:
      • Shortened chime cable
      • Removed blue power antenna input
      • Extended harness length by 2"
      • Removed constant 12v and ground connections from relay to module

    ***No download available, harness update only***

  • Firmware Download, Version (Released on October 15th, 2018)
    Release Notes

    Initial release

    ***No Download Available. This is just a revision history.***


Easily upgrade a vehicle’s radio without losing OnStar and other factory features with PAC’s RadioPRO Advanced Radio Installation Adapter.

RadioPRO Advanced has been engineered to save you time and seamlessly integrate into a vehicle’s databus system to retain features such as OnStar, steering wheel controls, factory amplifier, rear-seat entertainment system, and warning chimes.

Key Features

  • OnStar retention
  • Steering wheel control retention
  • Warning chime module included
  • Bose amplifier retention (Standard and Premium)
  • Rear-seat entertainment system retention (GMRVD required)
  • Retains factory Bluetooth (2009+ model vehicles)
  • In-field firmware updatable (PAC-UP required)
  • Antenna Adapter included
  • Factory USB port retention cable included
  • Dual Zone function
  • Retains back-up sensors/park assist and back up camera signal
  • Retains rear seat audio controls
  • Retains factory satellite radio with text displayed in the Driver Information Center (cluster display)


  • Easier installation
  • Improved factory feature retention
  • PAC quality and reliability

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

GM3A-RSTX Instructions
*** Applies to rev only!***
 Download (1.24M)
GM3A-RSTX Instruction Manual
***Applies to rev or earlier***
 Download (946.83k)
Loss of Accessory Power
Tech bulletin for no accessory power output - Bypassing the module with the speaker wires. This tech brief only applies to modules that are blue.
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