PAC C2R-GM29 Installation Instructions

Class 2
VPW Arbitration J1850
1 0 0 0 1 1 1 0 1 1 1 1 0 0 1 0 0 1 1 0 1 1 0 0
This Interface is Intended for use in Vehicles without OnStar® or when OnStar® is not
serviced or is unwanted. For OnStar® Retention use the OS-3 or OS-3BOSE.
The C2R-GM29 allows aftermarket radio installation without retention of the factory radio. The interface replicates all factory warning chimes,
audible turn signal indicators and provides a data bus generated 12 volt accessory output that acts just as GM's R.A.P. (Retained Accessory
Power) system did prior to radio removal. R.A.P. keeps the radio powered after the key is off, until the driver door is opened or a 10 minute
timer ends, whichever comes first. The C2R-GM29 also provides a SWC (Steering Wheel Control) output wire at the interface. By using this
interface, the Parking Assist System will receive a "healthy" system status and the Rear Seat Audio controls will also be available for use (if
equipped).
Installation:
If the Bose® Audio system is being used, connect the C2R-GM29's RCA inputs to the aftermarket radios pre-amp output. The audio level will vary depending on
the new radios pre-amp output voltage (2-4 volts is recommended). If the Bose® Audio system is not used or present, cut the RCA inputs off and connect the new
radios speaker outputs to the remaining wire. If the vehicle and the interface both chime, move the chime switch to the off position. The other wire connections
are as follows:
• Yellow - 12 Volt Constant Voltage
• Black - Ground
• Red - 12 Volt R.A.P Voltage (1 AMP max)
• Blue/White - Antenna turn on, Amplifier turn on, and RSE turn on (if equipped)
• Orange - Dimmer/Illumination
• Lt. Green - SWC Output Wire
Using the SWC Output wire -
Use the green SWI interface wire and program the SWI interface for version 2. Follow ONLY the
interface programming instructions included with the SWI interface. Do not cut the Brown loop.
**If more than 1 AMP is needed from the Red +12v Accessory wire refer to Fig 1.
A B
1
2
3
Illumination (Orange)
Battery (Yellow)
Ground (Black)
Amp Turn On / Antenna (Blue)
+12 Acc.1 AMP max (Red)
SWC Output (Lt. Green)
4
*Use Version #2*
A B
These Buttons will
perform the
same function as the
Steering Wheel
Buttons do (when
a SWC interface
is used)
DISCLAIMER: Under no circumstances shall the manufacturer or the distributors of the C2R-GM29 parts be held liable for consequential damages sus-
tained in connection with the C2R-GM29. The manufacture and it's distributors will not, nor will they authorize any representative or any other individual
to assume obligation or liability in relation to the C2R-GM29 other than its replacement.
07-30-07
techsupport@pac-audio.com • Voice: 714-835-3022 • Fax: 714-835-3233 • www.pac-audio.com
J1850
EOD CRC
Class 2
1 1 1 0 1 0 0 0 0 1 1 0 1 1 0 1 1 1 0 0 1 1 0 0
Connect the SWC (green) output wire to a P.A.C. SWI interface.
C
C
On
Pacific Accessory Corporation - 1502 S. Santa Fe Street, Santa Ana, CA 92705
C2R-GM29
GM Radio Replacement
Interface for GMLAN Vehicles
Without OnStar®
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D E
D E
Turns the
Rear Seat
Audio on
and off
Class 2 J1850
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Fig. 1
High Current 12v
(using a SPDT relay)
(Fused)
12v Acc.
85 87 86
From
87a
Interface
30
Diode 1N4005
or equivelant
New High
Current Output
F G
Only for
GMLAN
29 bit
Vehicles.
Pacific Accessory Corporation
GMLAN Warning Chime and Radio
Replacement Interface
Chime On / Off
F G
Using the RSA Controls
The headphone jacks will play the rear zone source
selected by the head unit (refer to the new radios instruc-
tion manual for details on this feature if equipped).
Notes: When the Rear Seat Audio jacks are activated in
any vehicle OTHER than the Cadillac Escalade or GMC
Yukon Denali the rear speakers will mute.
Class 2
Ground
H
1
2
3
4
H