PAC NU-GM3 - User Manual

Pacic Accessory Corporation - Santa Ana, CA 92705
techsupport@pac-audio.com • Voice: 866-931-8021 • Fax: 714-835-3233 • www.pac-audio.com
03-27-10
J1850
Class 2
VPW
Class 2
J1850
100011101111001001101100
111010000110110111001100
Arbitration
EOD
CRC
100011101111001001101100
111010000110110111001100
Class 2
Class 2
J1850
J1850
Class 2
VPW
Class 2
J1850
100011101111001001101100
111010000110110111001100
Arbitration
EOD
CRC
100011101111001001101100
111010000110110111001100
Class 2
Class 2
J1850
NU-GM3
GM LAN 29bit
Navigation Unlock
Integration Interface for
Vehicles with 44-Pin Connector
Installation:
Disconnect the black 44-pin main harness from the back of
the radio (see g. A) Plug the male connector on the NU-GM3 harness into the
44-pin port on the back of the radio. Connect the factory 44-pin harness into
the female connector on the NU-GM3 harness.Plug the Black micro-t 24-pin
connector on the NU-GM3 harness into the NU-GM3.
Locate the vehicles VSS wire in pin 20 of the gray 20-pin plug on the back of
the radio (see g. A & B). PLEASE NOTE: The color of the wire in pin 20
will differ depending on the vehicle you are working on. This wire will need
to be cut then connected as follows: The green/black wire from the NU-GM3
should be connected to the radio/plug side of the VSS wire and the green/white
wire from the NU-GM3 should be connected to the vehicle side of the VSS
wire.
If you wish to enable the reverse camera unlock feature you must power up
the factory reverse camera. To do this a wire must be ran from the NU-GM3’s
red camera turn on wire to the factory power wire for the reverse camera. The
location of this wire will vary depending upon which vehicle you are installing
the NU-GM3 into. Please see the next page for the different locations.
Please Note: If the customer does not wish to use the Reverse Camera unlock
feature you do not have to locate and connect this wire. However if the lock
button is pressed when the NU-GM3 is active the screen will switch to reverse
camera mode.
The NU-GM3 is a Navigation Unlock integration interface that allows the factory navigation features of
your GM radio or the reverse camera to be used by the passenger at anytime.
NU-GM3
GM LAN 29bit Universal
Navigation Unlock Interface
To Vehicle
See Chart Below
For Connections
To Factory Radio
NUGM3 Harness
Connection Diagram
Wire Color Function Connect To
Red Reverse Camera Turn On Output (+) Reverse Camera Trigger in Tailgate
Green/White VSS Input Vehicle side of wire in pin 20 of the gray 20-pin plug behind radio
Green/Black VSS Output Radio side of wire in pin 20 of the gray 20-pin plug behind radio
Installation
Page 1
Main 44-pin Plug
Gray 20-pin Plug
Pin 20
Fig A
Fig B

Summary

Installation

Connecting the NU-GM3 Harness

Connects the NU-GM3 harness to the vehicle's radio and factory harness, including the micro-fit connector.

VSS Wire Connection

Details how to cut and connect the vehicle's VSS wire to the NU-GM3 harness for proper function.

Reverse Camera Power Connection

Explains how to power the factory reverse camera for the unlock feature by running a wire from the NU-GM3.

Reverse Camera Wire Connection

Locating Reverse Camera Harness and Wire

Guides on finding the reverse camera harness and specific wire in different GM vehicles.

Connecting Camera Wire with Diode

Instructions for connecting the camera turn-on wire to the vehicle's reverse camera wire using a diode.

Verification of Reverse Camera Function

Steps to verify that the reverse camera unlock feature works correctly without engaging reverse lights.

Operation

Activating the Navigation Unlock

Procedures for enabling and disabling the navigation unlock feature via steering wheel controls.

Activating the Reverse Camera Unlock

Steps to activate the reverse camera view on the navigation screen using the lock button.

Important Safety Warning

Warns drivers against using unlocked systems while the vehicle is in motion to avoid distraction.

Installation and Compatibility Notes

Notes on OnStar interaction and initial reverse camera functionality setup including shifter position.

PAC NU-GM3 Specifications

General

Brand	PAC
Model	NU-GM3
Category	Automobile Accessories
Language	English