![PAC GM1A-RS Manual Download Page 2](http://html1.mh-extra.com/html/pac/gm1a-rs/gm1a-rs_manual_3124879002.webp)
GM1A-RS
Radio Replacement Interface with
Steering Wheel Control Retention
for select General Motors Vehicles
with Class II Data-Bus
© 2018 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.
PAC-audio.com
Pacific Accessory Corporation
Rev: V8
Date: 080118
Page 2
Interface Connector 1 Interface Connector 2 Interface Connector 3
Vehicle Connector 1
5. Remove the factory radio and plug in the GM1A-RS’s vehicle harness into the factory
vehicle harness.
6. If you wish to reassign functions to the SWC, follow the programming instructions in
the next section.
7.
If the vehicle has a standard Bose system, does not have a factory amplifier at all,
or if you are connecting an aftermarket amplifier 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 (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 (+)
Blue / Yellow
SWC Output / Key 1
Brown
SWC Output / Key 2
3.5 mm Jack
SWC 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
Line Output
Converter (LOC-1)
Chime Speaker
Wiring Connections
VS41 Wiring
The VS41 can be connected to the GM1A-RS 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.
Amplified
Non-Amplified
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 only)
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 MODULE
SETTING
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