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GMPD3

Copyright© 2004-2007 SoundGate®. All Rights Reserved. 
SoundGate® is a registered trademark of Stillwater Designs, Inc. 
All other trademarks are the property of their respective owners.

www.soundgate.com

    Rev 20080624

Purpose

The GMPD3 lets you connect and 

control an Apple iPod directly from the 

controls on your factory GM radio. All 

factory options, including XM, continue 

to operate!

Features

The GMPD3 uses a simple “Y” or “T” 

harness for installation using factory 

connectors. There is 

no need

 to cut or 

splice any wires, including power and 

ground!

If you experience problems, call SoundGate Technical Support at 800-256-0808, or email us at [email protected].

The GMPD3 works in the following vehicles:

Before You Start

WARNING

DO NOT DISASSEMBLE OR ALTER

Doing so may result in an accident, fi re, or electric shock.

Do not block your view

Do not mount product or any added audio/video equipment where it can block your view through the windshield or block your view 
of dashboard indicators and displays.

Do not block safety devices

Do not mount product or any added audio/video equipment where it can obstruct the operation of any safety device, such as the 
airbag.

Distraction warning

Do not allow product or any added audio/video equipment to distract you while you are driving.

BEFORE WIRING, DISCONNECT THE CABLE FROM THE NEGATIVE BATTERY TERMINAL

Before starting any installation work , wait 90 seconds after turning the ignition switch to the LOCK position and disconnecting the negative (-) terminal from the battery. The 
supplemental restraint system (SRS), or airbag(s) is equipped with a backup power source. If installation work is started less than 90 seconds after disconnection of the negative 
(-) battery terminal, the SRS may deploy. When the negative (-) terminal cable is disconnected from the battery, the clock and audio systems’ memory may be erased. Before 
starting installation work, make a record of the clock and audio systems’ memory settings. When installation is complete, reset the clock and audio systems to their previous 
settings. Power tilt, power telescopic steering column, power seats, power mirrors, power shoulder belt anchorage, and other power accessories may or may not be equipped 
with a memory function; consider keeping a record of these settings as well.

When installation is complete, readjust the features to their previous settings.
Never use a backup power supply (such as another battery) during installation work in an attempt to avoid losing these memory settings.

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– GMPD3 Module

– Apple iPod dock connector

– “Y” harness (for radios 

with

 factory XM)

– “T” harness (for radios 

without

 factory XM)

    Note: More than one “T” harness is included. Please read the INSTALLATION 

 

       section for details on which harness you should use for your vehicle.  

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iPOD Details

The GMPD3 is designed to interface only with the GM vehicles listed on the front of this manual and the Apple iPod (4th generation 

and later), iPod Mini, iPod Nano, iPod Photo, and iPod Video.

We recommend that you turn on your iPod’s 

SoundCheck

 option.  On certain factory radios, you may experience audible distortion 

if 

SoundCheck

 is not turned on.

Installation Overview

Please read this section fully and follow these steps closely to ensure that the GMPD3 functions correctly upon installation.  The 

basic install procedure is outlined below (detailed steps are presented in the 

INSTALLATION

 section of this manual).

Confi gure DIP switches on GMPD3 module.

1. 

Connect “T” harness to factory radio (or “Y” harness to factory XM module).

2. 

Connect “T” (or “Y”) harness to GMPD3 module.

3. 

Connect iPod dock connector cable (and optionally connect an AUX input source) to GMPD3 

4. 

module.
Mount the GMPD3 module.

5. 

Connect iPod to GMPD3 iPod dock connector cable.

6. 

Confi guration

The GMPD3 must be confi gured before installation and use. On the rear side of the GMPD3 module is a series of fi ve small, DIP-style 

switches that must be set to a specifi c combination of 

ON

 and 

OFF

, depending upon whether or not your vehicle has a factory-

equipped XM tuner. Use the diagrams below to confi gure the DIP settings for your vehicle.

IMPORTANT

During confi guration of the DIP switches, no cables should be connected to the GMPD3 module. If you change 

DIP switch settings while cables are connected, you must unplug the cables and reconnect them before the 

changes will take effect. This is especially important to remember if transferring the GMPD3 from one vehicle 

to another, as re-programming the DIP switches may be necessary.

Five DIP switches are located on the rear of the GMPD3. To confi gure a switch to the 

ON

 

position, press 

the switch 

downward

. Press the switch 

upward 

for the 

OFF

 position. In this example, switch 1 is turned 

ON

.

2 3 4 5

DIP         ON

ON

DIP settings for the GMPD3 iPod interface:

For compatible GM vehicles (listed on the front of this manual) equipped with 

GMLAN 29-bit radios

....

CAUTION

DO NOT SPLICE INTO ELECTRICAL CABLES

Never cut away cable insulation to supply power to other equipment. Doing so will exceed the current carrying capacity of the wire 
and may result in fi re or electric shock.

DO NOT ALLOW CABLES TO BECOME ENTANGLED IN SURROUNDING OBJECTS

Cables or wiring that obstruct or get caught on places such as the steering wheel, shift lever, brake pedals, etc. can be extremely 
hazardous.

DO NOT INSTALL IN LOCATIONS WITH HIGH MOISTURE OR DUST

Moisture or dust may result in product failure.

HAVE THE WIRING AND INSTALLATION DONE BY EXPERTS

The wiring and installation of this product requires special technical skills and experience.

USE ONLY SPECIFIED ACCESSORY PARTS

Use of other than specifi ed parts may damage product internally.

FOLLOW THE OPERATIONAL AND INSTALLATION MANUALS.

YOU SHOULD READ AND FAMILIARIZE YOURSELF THOROUGHLY WITH THE FOLLOWING INFORMATION PRIOR TO INSTALLING AND 
USING THIS UNIT. IN ADDITION, YOU MUST CAREFULLY READ AND FOLLOW THE INSTALLATION SCHEMATICS AND INSTRUCTIONS 
FOR THE PRODUCT AND THE VEHICLE IN WHICH IT IS BEING INSTALLED. FAILURE TO FOLLOW INSTALLATION INSTRUCTIONS MAY 
DAMAGE THE PRODUCT AND THE VEHICLE, WILL VOID THE PRODUCT WARRANTY, AND MAY VOID THE VEHICLE WARRANTY.

CHECK YOUR LOCAL LAWS

Some States/Provinces or other governmental jurisdictions (such as cities) may have laws that prohibit the operation of a video 
screen within the sight of the driver. If you have purchased such a product, you should use the product only in locations where it is 
legal to do so, and if you do use the product, set up the screen so it is only visible to passengers.

TROUBLESHOOTING

Should this product fail to operate properly, please contact your Dealer or SoundGate Technical Support.

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Before You Start

Before You Start

Simple-fi.

BUICK

Lucerne*  

2006–2008

CADILLAC

Escalade/EXT/ESV* 2007–2008

CHEVROLET

Avalanche* 2007–2008
Cobalt*  

2007–2008

Equinox*  

2007–2008

Impala*  

2006–2008

Monte Carlo* 

2006–2008

Pickup HD* 

2007–2008

Suburban* 2007–2008
Tahoe*  

2007–2008

GMC

Sierra/Denali/HD Truck 

2007–2008

Yukon/Denali/XL  

2007–2008

HUMMER

H2/HUT 

  2008

PONTIAC

Torrent* 

  2007–2008

SUZUKI

XL7* 

  2007

1: OFF
2: 

ON

3: OFF
4: OFF
5: OFF

Standard Radio

WITH

 Factory XM

WITHOUT

 Factory XM

2 3 4 5

DIP         ON

2 3 4 5

DIP         ON

1: 

ON

2: 

ON

3: OFF
4: OFF
5: OFF

Navigation Radio

WITH

 Factory XM

WITHOUT

 Factory XM

1: 

ON

2: OFF
3: OFF
4: OFF
5: OFF

1: OFF
2: OFF
3: OFF
4: OFF
5: OFF

2 3 4 5

DIP         ON

2 3 4 5

DIP         ON

Escalade Radio (non-Navigation)

WITH

 Factory XM

WITHOUT

 Factory XM

1: 

ON

2: 

ON

3: 

ON

4: OFF
5: OFF

1: OFF
2: 

ON

3: 

ON

4: OFF
5: OFF

2 3 4 5

DIP         ON

2 3 4 5

DIP         ON

Check www.soundgate.com for the most current
compatibility information.

*

Vehicle must be XM Radio Ready

Note: Your radio must have a 

BAND

 

button to be compatible 

with the GMPD3.

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