RadioPRO 3 RP3-GM12 - Car kit PAC - Free user manual and instructions

Product Type	Radio Interface Module / Car Kit
Model	RadioPRO 3 RP3-GM12
Brand	PAC
Compatible Vehicles	Select General Motors (GM) models with factory radio
Main Functions	Retains steering wheel controls, chimes, and data bus functions when replacing factory radio
Input Voltage	12V DC (vehicle electrical system)
Dimensions (approx.)	3.0 x 2.0 x 1.0 inches (7.6 x 5.1 x 2.5 cm)
Weight (approx.)	0.2 lbs (90 g)
Wiring Harness	Plug-and-play, vehicle-specific connectors included
Installation	Requires basic wiring and mounting; disconnect battery before installation
Maintenance	Wipe with dry cloth; no liquid cleaners
Safety Notes	Disconnect vehicle battery negative terminal before installation; avoid short circuits
Spare Parts / Repairability	Not user-serviceable; contact PAC support for replacement
Operating Temperature	-20°C to 70°C (-4°F to 158°F)
Package Contents	RadioPRO 3 module, wiring harness, installation guide
Certifications	CE, FCC compliant (typical)

Frequently Asked Questions - RadioPRO 3 RP3-GM12 PAC

What does the PAC RadioPRO 3 RP3-GM12 do?

It is an interface module that allows you to replace the factory radio in select GM vehicles while retaining steering wheel controls, factory chimes, and data bus functions.

Which vehicles are compatible with this module?

It is designed for select General Motors (GM) vehicles such as Chevrolet, GMC, Buick, and Cadillac models from the mid-2000s to 2010s with a factory radio that uses the GM12 connector.

Is the installation plug-and-play?

Yes, it includes vehicle-specific harnesses that connect directly between the aftermarket radio and the vehicle's wiring. However, you may need to connect power, ground, and speaker wires to the aftermarket radio harness.

Do I need any special tools to install this module?

Basic tools like wire strippers, crimpers, electrical tape, and a multimeter are recommended. Also, have panel removal tools to access the factory radio.

Will I lose any factory features after installation?

With this module, you should retain all factory features like steering wheel controls, door chimes, OnStar (if equipped), and audible warnings. Some non-essential features may vary.

How do I program the steering wheel controls?

The module comes pre-programmed for most vehicles. If customization is needed, refer to the manual for button mapping using the aftermarket radio's remote input.

Can I use this module with a non-GM vehicle?

No, it is specifically designed for GM vehicles with the GM12 data bus. Using it with other makes may cause damage or malfunction.

What should I do if the module doesn't work after installation?

First, double-check all wiring connections and ensure the vehicle battery is connected. If issues persist, consult the troubleshooting guide or contact PAC support.

Is the module compatible with all aftermarket radios?

It works with most aftermarket radios that have standard wiring. However, some radios may require additional adapters for full functionality.

Where can I find the user manual?

The manual is available for free download on the PAC website or at notice-facile.com. You can also request a translated version.

USER MANUAL RadioPRO 3 RP3-GM12 PAC

Introduction & Features

The RP3-GM12 interface allows the replacement of a factory radio in select General Motors vehicles with Class II radios. Using this interface will retain factory features such as Warning Chimes when the original radio is removed. The RP3-GM12 provides data bus driven outputs such as retained accessory power (RAP), vehicle speed sensor (VSS), illumination, reverse trigger and parking brake. The RP3-GM12 also provides a secondary output for adding an optional PAC Steering Wheel Control (SWC) retention interface (SWI-RC, SWI-PS, SWI-JACK, SWI-ECL2 or SWI-X).

Important Notes

1. For BOSE systems, the recommended line level input is between 2-4 volts from the aftermarket radio.
2. To prevent over driven audio when installing into a vehicle with a BOSE system and the aftermarket radio does not have low level outputs then an LOC (part # SOEM-4 or LP3-4) is recommended to match the input voltage.
3. Use the 4 position selector switch located on the side of the interface to select the best chime output for your specific installation.

Wiring Connection Chart

Interface Connector

Red / White Parking Brake Output (-)*

Purple / White Vehicle Speed Output*

Blue / White Amp Turn On Input

Red Accessory Output (10 amp)

Orange / White Illumination Output (+)*

Green Reverse Output (+)*

*Not all radios will have these connections. Please insulate these wires when not used.

Vehicle Connector

Yellow Battery +12v
Black Ground
Blue Antenna On Input
White Front L + input
White / Black Front L - input
Grey	Front R + input
Grey / Black	Front R - input
Green	Rear L + input
Green / Black	Rear L - input
Purple	Rear R + input
Purple / Black	Rear R - input

Illustration / Schematic

Installation Steps

1. It is extremely important to make sure the ignition is off and the drivers door open before connecting the interface to the vehicle.
   2 Make all connections as described in the chart on page 1. The audio level will vary depending on the new radios pre-amp output voltage (2-4 volts is recommended).
2. Follow the instructions below if you wish to add an optional SWC retention interface.

Steering Wheel Control Output Connector

1. The RP3 provides a SWC output connector attached to the harness. For ease of installation, all necessary connections for an SWI have been made for you.
2. When using this SWC output connector the SWC interface MUST BE PROGRAMMED FOR VERSION 2. (refer to SWC interface programming instructions for exact programming sequence).
3. Both loops should remain in tact.
4. During steering wheel button assignment programming the vehicle should be running and each button should be pressed and held for at least 5 seconds. Please refer to the SWI manual for button assignment order.

Testing & Verification

1. Turn the ignition on. The LED on the interface will turn on & the +12v accessory wire will turn on.
2. Turn on the radio & check balance & fade.
3. Verify that the factory subwoofer (if present) is playing
4. If an optional SWC retention interface was used, verify that all SWC are functioning properly.
5. Turn off vehicle & remove key. RAP will be active & keep the radio on for 10 minutes or until the drivers door is opened.
6. The LED & radio will turn off when RAP turns off or the drivers door is opened.
7. Use the 4 position selector switch located on the side of the interface to select the best chime output volume for your specific installation. Setting 1 being loudest and 4 softest.

Product Updates (Firmware)

The RP3-GM12 can be updated with new firmware as it becomes available using the PAC-UP interface updater (sold separately). Please visit www.pac-audio.com/fi rmware for available updates.