User Manual
Radio Replacement and Steering Wheel Control
Interface for Select General Motors Vehicles
RP4-GM11
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Pacific Accessory Corporation
Page 2
Rev: 2
Date:052518
Installation Steps
1
.The radio select rotary switch on the side of the interface must be adjusted to the proper radio setting before plugging
the interface into the vehicle.
2. Make all connections as described in the chart on page 1. If there is a Bose® Audio system present: Connect the RCA
inputs to the aftermarket radio’s pre-amp output. The audio level will vary depending on the new radio’s pre-amp output voltage
(2-4 volts is recommended). If there is not a Bose® Audio system present: Cut off the RCA inputs, and connect the aftermarket
radio’s speaker outputs to the remaining wire according to the chart on page 1.
3. Connect the SWC wire according to the chart on page 1 (aftermarket radio MUST support a wired remote input).
4. If you wish to reassign functions to the SWC, follow the “Optional Steering Wheel Control Programming” instructions below.
IMPORTANT! The interface comes pre-programmed for the functions listed in the chart below, and does not require programming unless you
wish to re-assign the SWC functions to different buttons. The SWC can always be restored to default settings by pressing the program button on
the side of the interface once, and waiting for the timeout. PLEASE NOTE: Due to the many different possible OEM SWC congurations,
some applications may need to be reprogrammed for the SWC assignments to make sense.
Alpine JVC Kenwood Clarion Sony / Pioneer Fusion
Volume +
Volume + Volume + Volume + Volume + Volume + Volume +
Volume -
Volume - Volume - Volume - Volume - Volume - Volume -
Source Up
Source Source Disc/FM+ Source Source Source
Source Down
Band Preset + Disc/AM N/P Band Off
Seek Up
Track + Track + Track + Search + Track + Track +
Seek Down
Track - Track - Track - Search - Track - Track -
Voice
Voice Voice Voice Voice Voice Mute
Prog
Preset Up Preset - Source Band Preset + Audio
Optional Steering Wheel Control Programming
Default SWC Button Assignments (Trucks & SUVs)
Alpine JVC Kenwood Clarion Sony / Pioneer Fusion
Volume +
Volume + Volume + Volume + Volume + Volume + Volume +
Volume -
Volume - Volume - Volume - Volume - Volume - Volume -
Seek Up
Track + Track + Track + Search + Track + Track +
Seek Down
Track - Track - Track - Search - Track - Track -
Voice
Voice Voice Voice Voice Voice Mute
End
Source Source Source Source Source Source
Default SWC Button Assignments (Corvette)
Default Steering Wheel Control Programming
If you wish to re-assign the SWC functions or utilize short press long press dual command functionality, the interface must be
programmed in the specic order shown on the chart on the next page. If you come across a function in the chart that your steering
wheel does not have, or you do not want to program, press and release the programming button on the side of the interface to skip
that function. The LED will ash off and on conrming that you have successfully skipped that function and are ready to proceed
to the next one.
Short Press Long Press Dual Command Functionality
This feature allows you to assign two aftermarket radio functions to each of the vehicle’s SWC buttons. It can be used with as
many of the buttons as the user likes or none at all. When this functionality is implemented, quickly pressing and releasing a SWC
button will initiate the short press command, while pressing and holding a SWC button for longer than two seconds will initiate the
long press command. Please note that no long press commands are programmed by default. If you wish to assign dual command
functionality to the SWC please follow the programming steps on the next page.
1
2
3
4
5
6
7
8
9
0
Alpine JVC
Kenwood /
Lightning Audio
Clarion /
Nakamichi
Pioneer /
Other*
Sony Fusion
1 2 3 4 7 8 9
*Other - Dual / Axxera, Jensen, Rockford Fosgate
SET RADIO SELECT SWITCH