J1850
Class 2
VPW
Class 2
J1850
1 0 00 1 1 10 1 11 1 0 0 1 00 1 1 0 11 0 0
1 1 1 0 1 0 0 0 0 1 1 0 1 1 0 1 1 1 0 0 1 1 0 0
Arbitration
EOD
CRC
1 0 0 0 1 11 0 11 1 1 0 0 1 0 0 1 1 0 1 1 0 0
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
Class 2
J1850
VCI-GM3
DB9 connector
Red Wire
Black Wire
Video 1 On/Off
Switch
Blue: +12v Reverse
Light Trigger
(VIdeo 2)
White:
ground output
Green:
Parking Brake input (-)
White:
ground output
Video 2
Video 1
Video Camera Interface Kit for the GM Full Size Truck & SUV Navigation Radios
This interface will ONLY work in these vehicles -will NOT work with any other GM navigation radios
The installation instructions steps MUST be followed carefully and in order. Failure to follow these
steps may result in damage to the navigation unit!
1. Connect the VCI-GM3’s black power wire to chassis ground. Connect the red wire to the vehicles +12 volt accessory. The power wires are the ones coming out
from the DC 12V side of the case. If using the NAV-1129, simply connect the red wire to the retained accessory power and the black wire to the ground output.
2. Connect the VCI-GM3’s Blue Trigger wire to the vehicle’s +12 volt reverse light supply wire. The Reverse wire will show +12 volts when the vehicle is put into
reverse. If using the NAV-1129, simply connect to the reverse output.
3. Connect the Video Back-up Camera’s video output to the VCI-GM3’s Video 2 input. (Optional: The VCI-GM3’s Video 1 input can be used for a second video
backup camera. The toggle switch selects between the radio’s normal display or Video 1 input. Video 2 input has precedence over Video 1 input, when the blue
wire receives +12volts, regardless of the switch position.)
RIBBON A
RIBBON B
1) With the navigation unit on, press the “Change Map Cover-
age” option under the “Nav” menu and eject the navigation
2) Be sure you have removed the Map Disc, then with the display
open, disconnect and remove the navigation unit from the vehicle.
disc. WARNING! Wait for the Map Disc to eject and set
aside. Failure to eject the Map Disc will cause failure of
the navigation DVD-ROM Drive.
3) Remove the small Phillips screw on each side of the display. Re-
4) Remove the plastic shield covering the factory ribbon cable.
move the display from the navigation unit
DISCLAIMER: Under no circumstances shall the manufacturer or the distributors of the VCI-GM3 parts be held liable for consequential
damages sustained in connection with the VCI-GM3. The manufacturer 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 VCI-GM3 other than its replacement.
12-4-2007
Pacic Accessory Corporation - 1502 S. Santa Fe Street, Santa Ana, CA 92705
Techsupport@pac-audio.com • www.pac-audio.com
Page 1
5) Carefully lift up on the release tab and remove the factory
ribbon cable.
6) Remove the two screws from the center cover. Remove the
center cover.
7) Carefully lift up on the release tab and remove the factory
ribbon cable and replace with the Ribbon A cable with the
small connector closest to the navigation unit.
9) Route the Ribbon B cable over the large factory white ribbon cable to avoid the gears.
8) Route the RIBBON B cable through the side of the
navigation unit with the contacts facing DOWN.
10) Connect the RIBBON B cable to the RIBBON A cable with
the contacts facing UP. A half twist on the Ribbon B will be
necessary for the next step.
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11) Carefully fold and insert the Interface ribbon cable inside
the navigation unit cavity.
13) Secure the cable to the bottom of the navigation unit.
12) Assemble the navigation unit in reverse order of steps.
14) Connect the VCI-GM3’s black power wire to chassis
ground. Connect the red wire to the vehicles +12 volt accessory. The power wires are the ones coming out from the DC
12V side of the case. Connect the DB-9 cable to the VCIGM3. Reinstall the navigation unit and verify operation of the
factory navigation unit. Insert the Map Disc.
NOTES:
The factory backup camera (if applicable)
will always have priority when in Reverse.
The factory display will always have priority when watching a DVD or AUX in Park.
15) Verify operation of the aftermarket back up camera (and
Video 1 input if applicable).
Testing the VCI-GM3:
1. Turn the vehicle and radio on. The radio display should show normal information.
* If there is no image on the display, check for correct power connection on the VCI-GM3.
* If the image on the display scrolls across the screen, make sure the ribbon cable is seated in the connector correctly.
2. Temporarily put the vehicle into reverse being careful not to back into anything or anyone. The display screen will change to the video back-
up camera mode. Put vehicle back to Park and the radio display should show normal information.
*If the radio screen information disappears and you get a blank screen when the vehicle is put into reverse, check the video back-up
camera for proper power and video cable connection.
*The camera must be connected to Video 2 Input.
Pacic Accessory Corporation - 1502 S. Santa Fe Street, Santa Ana, CA 92705
Techsupport@pac-audio.com • www.pac-audio.com
Page 3
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