PAC GM1A-RST Manual

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Side 1/7

GM1A-RST

Radio Replacement Interface with

Steering Wheel Control and Telematics Retention

for select General Motors Vehicles

with Class II Data-Bus

PAC-audio.com

Rev: V6

Date: 100318 Page 1

Introduction and Features

Important Notes

1. 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.

2. The Programming Button and Adjustment Dial on the side of the interface have multiple functions. Please see Page 3 for

more details.

3. Aftermarket radios with a 2-wire resistive based SWC circuit will not have default button assignments programmed. Please

refer to the owners manual of the radio you are installing to nd out the proper SWC programming procedure.

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

5. Real time speaker fading on Premium factory amplied systems (Y91 / UQA) is only supported with the “amplied output”

connection of the GM1A-RST.

6. When using real time speaker fading (Premium Bose only), if the fader setting is biased more to the front or rear, as the radio

turns on the sound may begin at the default setting and then quickly transition to your custom setting.

7. Aftermarket radio features such as High Pass Filters (crossovers), DSP or “Network Mode” will interfere with proper fader

function (Premium Bose only). In order for the GM1A-RST’s fader function to work, the audio from the aftermarket radio’s

output must match so it can compare the front and rear audio levels and determine the proper fader setting for the factory

amplier.

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

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

Interface Connector 1

Expansion Port

Interface Connector 2 Interface Connector 3

Non-Amplied

Audio Output

LED 1

LED 2

The GM1A-RST 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 Steering Wheel Controls (SWC), Rear Seat Control (RSC), OnStar, warning

chimes and the factory Bose amplier when the original radio is removed. The GM1A-RST provides data bus driven outputs such

as retained accessory power (RAP), vehicle speed signal (VSS), illumination, reverse trigger and parking brake. 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-RST.

USB PortRadio Select

DIP switches

Interface Connector 4

Adjustment Dial Programming Button

Module Layout

Amplied

Audio Output

GM1A-RST

Radio Replacement Interface with

Steering Wheel Control and Telematics Retention

for select General Motors Vehicles

with Class II Data-Bus

PAC-audio.com

Rev: V6

Date: 100318 Page 2

Installation Steps

Alpine JVC Kenwood /

Lightning Audio

Clarion /

Nakamichi

2-Wire

Resistive

Pioneer /

Other* Sony Fusion

1 2 1 & 2 3 2 & 3 1, 2, & 3 4 1 & 4

Set DIP switches that correspond with your radio to the ON position.

Set all other DIP switches to the OFF position.

*Other - Dual / Axxera (these brands could also have 2-wire resistive), Jensen, Rockford Fosgate

1. Set the Radio Select DIP switches according to the radio you are installing.

2. Wire your aftermarket radio to the GM1A-RST’s harness according to the wiring connections chart below.

3. The Brown mute loop in Interface Connector 4 (if not cut) will turn the GM1A’s accessory output off when any OnStar

function is active. If the aftermarket radio has a mute input, cut this loop and connect the Brown wire in pin 23 to it.

4. Plug Interface Connectors 1 and 2 into the appropriate ports on the GM1A-RST interface (using the diagram on page 1 or

the label on the bottom of the interface).

5. The Connector 3 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 GM1A-RST (using the diagram on page 1 or the label on the bottom of the

interface).

6. If the aftermarket radio is equipped with an auxiliary input and you wish to retain the factory RSE audio, plug the RCA

connectors from the secondary harness into the radios auxiliary input.

7. Remove the factory radio and plug in the GM1A-RST’s Vehicle Connector 1 and Vehicle Connector 2 into the factory vehicle

harness.

8. If you wish to reassign functions to the SWC, follow the programming instructions on Page 4.

9. If you are connecting an aftermarket amplier to the cabin speakers, connect the chime speaker to the chime plug coming out

of Interface Connector 4 and install the chime speaker in a place free of obstructions, where it can be easily heard (usually

low in the dash facing downward).

Interface Connector 1

(3-pin)

Interface Connector 2

(20-pin)

Interface Connector 4

(24-pin)

Interface Connector 3

(12-pin)

Vehicle Connector 1

(24-pin)

Vehicle Connector 2

(12-pin)

Yellow 12v+

Red Accessory Output

(10 amp)

Black Ground

Brown Loop Mute Output

Blue Not Used

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

(VSS) Output

Blue / Yellow SWC Output / Key 1

Brown SWC Output / Key 2

3.5 mm Jack SWC Output

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

Produkt Specifikationer

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

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