PAC Car Stereo System C2R GM29 User Manual

C2R-GM29  
GM Radio Replacement  
Interface for GMLAN Vehicles  
Without OnStar®  
Class 2  
J1850  
1 1 1 0 1 0 0 0 0 1 1 0 1 1 0 1 1 1 0 0 1 1 0 0  
Class 2  
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  
Fig. 1  
• Black - Ground  
High Current 12v  
(using a SPDT relay)  
(Fused)  
• 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  
85  
87  
86  
12v Acc.  
From  
Interface  
Ground  
87a  
30  
Diode 1N4005  
or equivelant  
Using the SWC Output wire - Connect the SWC (green) output wire to a P.A.C. SWI interface.  
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.  
New High  
Current Output  
**If more than 1 AMP is needed from the Red +12v Accessory wire refer to Fig 1.  
A
B
C
D
E
F
G
H
1
2
3
4
1
2
3
4
Illumination (Orange)  
Battery (Yellow)  
Only for  
GMLAN  
29 bit  
Ground (Black)  
Amp Turn On / Antenna (Blue)  
+12 Acc.1 AMP max (Red)  
Vehicles.  
Pacific Accessory Corporation  
GMLAN Warning Chime and Radio  
Replacement Interface  
SWC Output (Lt. Green)  
*Use Version #2*  
Chime On / Off  
A
B
C
D
E
F
G
H
Turns the  
Rear Seat  
Audio on  
and off  
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).  
These Buttons will  
perform the  
same function as the  
Steering Wheel  
Buttons do (when  
a SWC interface  
is used)  
On  
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.  
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.  
Pacific Accessory Corporation - 1502 S. Santa Fe Street, Santa Ana, CA 92705  
07-30-07  
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