PAC GM3 User Manual

INSTRUCTION MANUAL

Pacic Accessory Corporation
1502 S. Santa Fe St. Santa Ana, CA 92705 USA
Voice: [phone] Fax: [phone]
Copyright ©2006 PAC

iPAC-GM3

iPOD INTERFACE

WITH AUXILIARY INPUT

LAN

Chapter 1 - Getting Started

1.1 Introduction

Thank you for purchasing the PAC’s iPAC-GM3 interface for OEM radios.
Designed for Video, Generation 3, 4, Mini, and Nano iPods. The IPAC­GM3 has three Modes of operation; Advanced, Manual, and Auxiliary In­put. Advanced Mode allows you to use your factory stereo buttons and
steering wheel audio controls (if equipped) to directly control your iPod.
In Advanced Mode the iPod text is displayed on the factory radio. Manual
Mode allows you to control your iPod directly using the click wheel con­trols. Auxiliary input mode allows an external audio device to play through
your factory system.

The iPAC-GM3 works with vehicles that have navigation-equipped radios,
non-navigation radios, and vehicles equipped with XM satellite radio (refer
to section 2.1b for details). At the press of a button, you can switch be­tween iPod, auxiliary input, and XM satellite radio (if equipped).

For updated production information, please visit PAC’s web site at www.

pac-audio.com/default.asp

1.2 Precautions (Important, Please Read)

UPDATING iPod FIRMWARE

For proper operation of the iPAC-GM3, your iPod must be updated with
the most recent version of rmware from Apple. This is done by accessing
apple’s web site: http://www.apple.com/ipod/download/.

PREVENTING DAMAGE TO YOUR VEHICLE OR iPod.

• The vehicle manufacturer recommends unplugging the iPod when not
in use.

• Do not plug in iPod until initialization is complete. Please see Section

2.2 for details.

• Prior to installation, ensure you know your radio security code.

• To eliminate the risk of an electrical short, we recommend removing the
negative terminal from the vehicles battery prior to installation.

4

PROPER MOUNTING LOCATION

Pac

Securely install the interface in a location free from; heat, humidity, mov­ing parts, sharp metal edges and direct sunlight. We recommend secur­ing the interface to a suitable location using; double sided tape, Velcro,
or wire ties.

1.3 Compatibility Notes

This section will inform you of the specic requirements for your factory
radio to be compatible with the iPAC-GM3. These notes will inform you of
any issues or circumstances that can affect the compatibility of our product
with your radio, audio system, or accessories. Not all Factory radios are
compatible with the iPAC-GM3. The iPAC-GM3 will only work on models
equipped with the specications listed below. Please read and understand
these notes before proceeding:

Radio Requirements

Non navigation radios must have a
“CAT” button. Works with all XM ready
navigation radios.

1.4 Harness Selection

The harness used is determined by whether or not your vehicle has an
OEM Satellite Radio tuner installed. If you have Satellite radio installed,

use the GM3HXM harness. If no Satellite radio is installed, use the
GM3H harness. Visit the PAC’s web site at www.pac-audio.com/default.

asp for more information.

5

Chapter 2 - Installation:

Part

#

GM3H

Male Plug

14 Pin Female Plug

FACTORY 14 PIN HARNESS

GM3H
Harness

14 Pin Male Plug

RCA CABLE

iPod PLUG

& CABLE

iPAC-GM3

OPTIONAL

AUDIO
SOURCE

FACTORY RADIO

iPod

Red Wire From T-harness Optional
ACC +12V OUTPUT works with RAP
( Retained Accessory Power)

FACTORY 16 PIN HARNESS

16 Pin Female Plug

16 Pin Male Plug

Male Plug

This chapter will explain how to install the iPAC-GM3 interface using the
GM3H and the GM3HXM harnesses. Some installations require you to
make wiring connections. To eliminate the risk of an electrical short, we

recommend removing the negative terminal from the vehicles battery prior
to installation.If you do not feel comfortable making these connections, we

suggest you seek professional installation.

2.1a Harness GM3H: (No XM)

1. Carefully remove the radio from the dash of the vehicle.

2. Plug the 14 & 16-pin male ends of the GM3H harness into the 14 &
16-pin ports on the back of the radio. Next connect the factory 14 &
16-pin male connectors into the 14 & 16-pin female connectors on the
GM3H harness.

3. Optional Connections:
RED: Retains Accessory Power (RAP). Provides 12V(+) accessory power
after the vehicle is turned off up to 10 minutes, or until the drivers door
is open.
RED/WHITE: Non-functional wire; no connection is necessary.

Note: Insulate all wires that are on the IPAC-GM3 harness that are not
used for installation

4. Connect the 8-pin connector on the iPod docking cable to the IPAC­GM3 interface. (DO NOT CONNECT IPOD AT THIS TIME, WAIT UNTIL
INITIALIZATION IS COMPLETE, SEE SECTION 2.2 FOR DETAILS)

5. Plug the male 24-pin connector of the GM3H harness into the
iPAC-GM3 interface.

6

2.1b Harness GM3HXM: (With XM)

Part # GM3HXM

Male Plug

16 Pin Female Plug

Factory 16 Pin Harness

GM3HXM Harness

16 Pin Male Plug

RCA
CABLE

iPod PLUG

& CABLE

32 Pin Power
Audio Harness

iPAC-GM3

OPTIONAL

AUDIO
SOURCE

XM TUNER

iPod

Red Wire From T-harness Optional
ACC +12V OUTPUT works with RAP
( Retained Accessory Power)

1.Locate factory XM tuner. It is often located behind the glove box. Remove
any panels if necessary to access XM tuner’s 16-pin harness. Unplug the
16-pin harness.

2. Plug the male end of the GM3HXM harness into the 16-pin port on the
XM tuner. Next connect the factory male 16-pin into the 16-pin female con­nector on the GM3HXM harness.

3. Optional Connections:
RED: Retains Accessory Power (RAP). Provides 12V(+) accessory power
after the vehicle is turned off up to 10 minutes, or until the drivers door
is open.
RED/WHITE: Non functional wire; no connection is necessary.

Note: Insulate all wires that are on the iPAC-GM3 harness that are not
used for installation

4. Connect the 8-pin connector on the iPod docking cable to the iPAC­GM3 interface. (DO NOT CONNECT iPOD AT THIS TIME, WAIT UNTIL
INITIALIZATION IS COMPLETE, SEE SECTION 2.2 FOR DETAILS)

5. Plug the male 24-pin connector of the GM3H harness into the
iPAC-GM3 interface.

7