PAC GM1A-RX Manual

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GM1A-RX

Radio Replacement Interface

for select General Motors Vehicles

with Class II Data-Bus

PAC-audio.com

Rev: V8

Date: 080118 Page 1

The GM1A-RX interface allows the replacement of a factory radio in select General Motors vehicles with the Class II Data-Bus.

Using this interface will retain factory features such as when the original radio warning chimes and the factory Bose amplier

is removed. The GM1A-RX provides data bus driven outputs such as retained accessory power (RAP), vehicle speed signal

(VSS), illumination, reverse trigger and parking brake. The GM1A-RX also provides an SWI Direct output for adding an optional

PAC Steering Wheel Control (SWC) retention interface (SWI-RC or SWI-CP2). Rear Seat Controls (RSC) if equipped will also

be retained with the SWI interface. You can also add multiple camera inputs to your aftermarket radio with Data-Bus controlled

automatic activation (front camera only) by connecting a VS41 into the expansion port on the GM1A-RX.

Module Layout

Important Notes

1. Does not retain OnStar.

2. Does not provide RSE audio to aftermarket radio.

3. Compatible in both Premium (Y91 / UQA) and Standard systems.

4. The included chime speaker should be used when: The vehicle has a standard Bose system (UQ7), the vehicle does not have

a factory amplier at all, or if you are connecting an aftermarket amplier to the cabin speakers.

5. The Programming Button and Adjustment Dial on the side of the interface have multiple functions. Please see Page 2 for

more details.

6. When used in conjunction with the add on camera controller (VS41) the GM1A-RX will only provide Data-Bus controlled

automatic activation for the front camera. Please refer to the vehicle specic VS41 instructions for more detail.

7. Fade is adjusted using the RadioPRO app, available at https://aampglobal.com/RadioProApp. The GM1A-RX module needs

to be connected to the vehicle, and the PC, to adjust chime volume.

8. In vehicles with Premium Bose (Y91 / UQA), dynamic fade is only supported by the GM1A-RT and GM1A-RST.

1. Wire your aftermarket radio to the GM1A-RX’s harness according to the wiring connections chart on the next page.

2. Plug Interface Connectors 1 and 2 into the appropriate port on the GM1A-RX interface (using the illustration above or the

label on the bottom of the interface).

3. Plug Interface connector 3 into the LOC-1 module. Connection will be dependent upon whether or not the vehicle has a

factory amplied system. Plug this connector into the appropriate port on the included line output converter (Part # LOC-1;

using the illustration on the next page or the text stamped into the housing). Improper connection will result in either very

over-driven audio in amplied systems or very low audio in non-amplied systems. If this occurs, disconnect the harness

from the LOC-1 Module, and connect it into the port on the opposite side of the LOC-1, the other connector on LOC-1 will

be let unused.

4. If you are also installing an optional SWC interface with the GM1A-RX, connect the SWI Direct Connector to the SWC

interface.

5. Remove the factory radio and plug in the GM1A-RX’s vehicle harness into the factory vehicle harness.

6. If necessary, program the SWC interface. Please see next section for more details.

7. If the vehicle has a standard Bose system, does not have a factory amplier at all, or if you are connecting an aftermarket

amplier to the cabin speakers, connect the chime speaker to the chime connector on the interface and install the chime

speaker in a place free of obstructions where it can be easily heard (usually low in the dash facing downward).

Installation Steps

Introduction and Features

USB Port

Expansion

Port

Interface

Connector 2

Interface

Connector 1

Chime

Connector

Programming

Button

Adjustment Dial

LED 2

LED 1

GM1A-RX

Radio Replacement Interface

for select General Motors Vehicles

with Class II Data-Bus

PAC-audio.com

Rev: V8

Date: 080118 Page 2

Installation Steps (cont.)

Yellow 12v+

Red Accessory Output

(10 amp)

Black Ground

Blue / White Remote On Input

Orange Not Used

Orange / White Illumination Output (+)

Purple / White Reverse Output (+)

Light Green Parking Brake Output (-)

Pink Vehicle Speed Signal

Output (VSS)

Purple Rear R + input

Purple / Black Rear R - input

Green Rear L + input

Green / Black Rear L - input

Gray Front R + input

Gray / Black Front R - input

White Front L + input

White / Black Front L - input

Wiring Connections

Interface Connector 1 Interface Connector 2 Interface Connector 3

Vehicle Connector 1

Steering Wheel Control Output Connector

Fig. A

1. The GM1A-RX provides a SWC output connector labeled “Connect to PAC Steering Wheel Control

Interface” (Fig. A). For ease of installation, all necessary connections have been made for you.

2. You can use either a PAC SWI-RC or an SWI-CP2 (sold separately).

a. When using an SWI-RC, the loop on the output connector should remain intact. Set the SWI-RC to

version two and program the buttons according to the SWI-RC instructions.

b. When using an SWI-CP2, use the DIP switch settings provided for the GM1A-RX in the ControlPRO

application. The steering wheel controls will be precongured for the vehicle and radio but can be

customized using the ControlPRO application. The loop on the output connector should remain intact.

Line Output

Converter LOC-1)

VS41 Wiring

Chime Speaker

The VS41 can be connected to the GM1A-RX and used to switch multiple cameras. Please refer to the document labeled “Instructions for

wiring the VS41 into 2003-2006 Chevy / GMC Trucks and SUVs” which can be found on www.pac-audio.com under the VS41 product

page.

Amplied

Non-Amplied

These products have settings that are adjustable through our RadioPRO PC app or through the push-button on the module.

Some settings are only adjustable through the PC app. Some of these settings require the module to be connected to the

vehicle. Below is a breakdown of these settings.

CONNECTED TO CAR NOT CONNECTED TO CAR

Chime volume (excluding Premium Bose Y91/UQA) YES NO YES

Factory amplifier settings:

Bass, Mid, Treble, Gain, and Fade

(

Premium Bose Y91/UQA onl

YES NO GAIN ONLY

OnStar volume (RST or RT products only) YES NO YES

Read product version YES YES N/A

Update firmware YES YES N/A

Camera settings (VS41 required) YES YES NO

AVAILABLE ON PC APP

AVAILABLE ON MODULESETTING

Adjustable Settings

Related Downloads

• RadioPRO PC App - http://aampglobal.com/RadioProApp

• Latest instruction manuals - search part number on pac-audio.com, and look on “Downloads” tab

Produkt Specifikationer

Mærke:	PAC
Kategori:	Ikke kategoriseret
Model:	GM1A-RX

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