PAC - GM1A-R - ***Serialized*** RadioPRO Advanced Radio installation Adapter for GM Class-2 Vehicles. Retains Factory amplified systems and provides internal

PAC – GM1A-R (Serialized)

RadioPRO Advanced Radio Installation Adapter
For GM Class-2 Data Vehicles
Retains Factory Amplified Audio Systems + OEM Warning Chimes

DESCRIPTION

• Integration interface for installing an aftermarket radio in GM vehicles using Class-2 data communication.

• Retains factory amplified audio systems, Bose® systems (when present), and vehicle warning / safety chimes.

• Serialized hardware version ensures correct data communication and chime volume logic for supported model years.

FEATURES

• Retains:

  • Factory amplifier turn-on and audio routing

  • Factory warning tones / key-in / seatbelt / door alerts

  • OnStar® audio routing (vehicle dependent)

  • Steering wheel control retention (when paired with compatible SWC module)

• Provides clean audio signal path to aftermarket radio.

• Maintains ignition/accessory power logic from GM Class-2 data bus.

• Designed for plug-and-play installation in place of the OEM radio harness.

FUNCTIONAL APPLICATIONS

• Replace factory radio with:

  • Single-DIN or Double-DIN aftermarket head units

  • Touchscreen receivers (CarPlay/Android Auto capable)

  • Marine / mechless digital media receivers

• Maintain full electrical and functional integration without cutting wires.

SPECIFICATIONS

• Vehicle Network Type: GM Class-2

• Retained Functions:

  • Factory amplified system audio routing

  • Chimes / safety alerts

  • OnStar® audio (when equipped and supported)

• Outputs Provided:

  • ACC 12V accessory turn-on output

  • Amplifier turn-on

  • Illumination (varies by vehicle)

  • Ground

• Audio Compatibility:

  • Bose® factory amplified systems

  • Non-Bose amplified systems

  • Base (non-amplified) systems

INSTALLATION NOTES

• Installs behind the aftermarket radio, connecting between:

  1. Factory radio harness

  2. New head unit harness

• No factory wire cutting required.

• Steering wheel control retention requires separate PAC SWC interface when desired.

• Chime volume may be configurable via module setting (generation-dependent).

FITMENT

• For GM vehicles equipped with Class-2 data systems — commonly found in:

  • Chevrolet: Silverado, Tahoe, Suburban, Impala, Trailblazer, Cavalier, Malibu

  • GMC: Sierra, Yukon, Envoy

  • Buick: LeSabre, Rendezvous

  • Pontiac: Grand Prix, Sunfire, Bonneville

  • Cadillac: Select older platforms with Class-2 (verify year)

• Fitment is confirmed by verifying the factory radio connector and data bus type.

INCLUDES

• GM1A-R (Serialized) Interface Module

• Vehicle radio connection harness

• Chime retention circuitry

• Installation / configuration instructions