background image

8

Connect iPod to GMPD4 iPod dock connector. Plug the connector in straight. Do not insert the 
cable at an angle or wiggle the cable during insertion.

Detailed Installation Guide

Turn your vehicle off and disconnect the negative terminal of your battery. Confi gure the DIP swtiches on the rear of the 

GMPD4 module (see page 3 for details). 

If your vehicle 

is not

 equipped with a factory XM tuner, connect the included “T” harness to the GMPD4 module and use 

the following steps suffi xed with 

a

. You may need to skip ahead to step 

3a

 to determine which included  “T” harness to 

use. If your vehicle 

is

 equipped with a factory XM tuner, connect the included “Y” harness to the GMPD4 module and 

use the following steps suffi xed with 

b

.

If your vehicle 

is not

 equipped with a factory XM tuner, the GMPD4 will interface directly to the back of your factory 

radio. Consult factory literature or professional help for detailed radio access information. Generally, the trim panel 

around the outside of the radio will pull free on late model radios, exposing the bolts holding the radio in place. Remove 

the bolts (7mm) to view the desired connections (other radios may require extra panels to be removed before the back of the radio 

can be viewed). The radio may contain several connectors, but only two will match the connectors on one of the included GMPD4 

“T” harnesses. Locate the matching connectors and disconnect them from the factory radio. These connectors are typically 14-pin 

and 16-pin; however, depending upon the vehicle, the number of pins may differ.  Ensure that you only disconnect the connectors 

that match the GMPD4 “T” harness. 

If your vehicle 

is

 equipped with a factory XM tuner, the GMPD4 will interface directly with your factory XM module. Locate 

the XM module in your vehicle or consult with a professional for help. Typically, the XM module is located behind the glove 

compartment in SUVs or in the back deck in cars and “crossover” vehicles. The XM module has a single 16-pin connector 

and an antenna connected. Disconnect the 16-pin connector from the factory XM module. 

Connect the factory 14-pin and 16-pin connectors that you disconnected from the radio in step 

3a

 to the matching 

locations on the GMPD4 “T” harness.

Connect the factory 16-pin connector that you disconnected from the XM module in step 

3b

 to the matching location 

on the GMPD4 “Y” harness.

Connect the remaining 14-pin and 16-pin connectors on the GMPD4 “T” harness to the matching locations on the back 

of the factory radio.

S T E P

1

S T E P

2

S T E P

3a

Connect the remaining 16-pin connector on the GMPD4 “Y” harness to the matching location on the factory XM 

module.

Connect the iPod dock connector cable to the GMPD4 module. You may also connect an optional AUX input to the RCA 

connectors on the GMPD4 module (white = LEFT, red = RIGHT).

Mount the GMPD4 module either behind the dash or glove compartment (mounting hardware not included). Be careful 

not to drill into wiring or vehicle mechanisms. You are solely responsible for securely fastening the GMPD4 in your 

vehicle. Ensure that the iPod dock connector is left in a convenient place for connection to your iPod/iPhone.

Connect your iPod to the GMPD4 dock connector. Plug the connector in straight. Do not insert the cable at an angle or 

wiggle the cable during insertion.

S T E P

3b

S T E P

4a

S T E P

4b

S T E P

5a

S T E P

5b

S T E P

6

S T E P

7

S T E P

8

Operation Instructions

The following instructions will demonstrate how to navigate through your iPod music and playlists using the controls on your factory 

radio. The factory radio controls’ corresponding functions are illustrated here. Please note that these examples only represent the 

most common GMLAN 11-bit and 29-bit radio interfaces—your radio’s controls may differ slightly.  

Please use the following section as a general operational guide for the GMPD4 interface and the following GMLAN 11-bit and 29-bit 

radios. Use the 

REFERENCE

 section on Page 11 for distinction between 11-bit radios of 

type “1”

 and 

type “2”

.

GMLAN 11-bit Radio - Type “1”

Using the 

• 

BAND

 button, select XM1 for iPod; select XM2 for AUX input. 

Note: every other rotation through the 

BAND selections will switch between XM (if equipped) and iPod/AUX input.

Press the 

• 

P-TYPE

 button to display iPod playlists.

Use the 

• 

DISPLAY ADJUST

 knob to scroll through iPod playlists.

Select a displayed playlist with 

• 

SEEK

S

.

Press 

• 

P-TYPE

 again to exit the playlist selection menu.

Use the 

• 

T

SEEK

S

 buttons to move forward or back through the current playlist.

Press and hold the 

• 

T

SEEK

S

 buttons to FF or RW.  Press the buttons again to stop FF/RW.

During playback, turn the 

• 

DISPLAY ADJUST

 knob to advance through songs by increments of 10.

Press the 

• 

INFO

 button then turn 

DISPLAY ADJUST

 to display Song number, Name, Artist, and Album.

GMLAN 11-bit Radio - Type “2”

Press and hold 

• 

W

SEEK

 while in XM mode to switch between factory XM and iPod/AUX input.

Use the pushbuttons below the 

• 

IPOD

 and 

AUX

 labels on the display to switch between iPod and AUX input.

Press the 

• 

CAT

 button to show folders on the display for iPod playlists, Artist, Album, Genre, Song, and AUX input. 

Use the 

TUNE

 [          ] knob to navigate through folders.

Select a displayed item with 

• 

SEEK

X

.

During playback, use the 

• 

W

SEEK

X

 buttons to move forward or back through the current iPod folder.

Press and hold the 

• 

W

SEEK

X

 buttons to FF or RW.  Press the buttons again to stop FF/RW.

During playback, turn the 

• 

TUNE

 [          ] knob to advance through songs by increments of 10

Press the 

• 

INFO

 [          ] button to display Song number, Name, Artist, and Album.During playback, Press the 

INFO

 

button on the touchscreen to display Song number, Name, Artist, and Album.

Why SoundGate Dealers have the 
edge...

The technologies used in today’s vehicles are as 
sophisticated as any laptop computer. At SoundGate we 
believe these new technologies are full of opportunities for 
mobile electronic dealers across the nation. We make it a 
high priority to not only research these new systems, but 
to understand them and their impact on the aftermarket 
car audio industry. Armed with this knowledge, we are 
well equipped to help you integrate new components into 
these systems with our innovative, high-performance 
interfaces and unparalleled technical support.

Be sure to ask your autosound 
specialist about these other 
exciting SoundGate products...

Auxiliary Input Interfaces and Docking Stations 

• 

which allow you to input audio from MP3 
Players, DVD/Video, Satellite Radio, and more 
to OEM and aftermarket car audio systems

High-performance Radio Replacement

• 

Interfaces for seamlessly integrating new 

• 

receivers or CD players into OEM audio systems

Competition-Grade Interfaces for adding amplifiers

• 

Remote Audio Control Interfaces that let 

• 

you control aftermarket receivers and CD 
players from your factory rear seat, or 
steering-wheel mounted audio controls.

And many others!

• 

Copyright© 2004-2008 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

iPod is a trademark of Apple Computer, Inc., registered in the U.S. and 
other countries.

OR

4

Connect double multi-pin factory 
connectors to matching locations on the 
GMPD4 “T” harness.

a. 

without

 factory XM

Connect 16-pin factory connector to 
matching location on the GMPD4 “Y” 
harness.

b. 

with

 factory XM

6

7

Connect iPod Dock cable to the GMPD4. 
You may optionally connect an AUX input 
source as well.

Mount the GMPD4 (behind dash or glove 
compartment). Be careful not to drill into 
wiring or vehicle mechanisms.

OR

5

Connect GMPD4 “T” harness to factory 
radio.

Connect GMPD4 “Y” harness to factory 
XM module.

b. 

with

 factory XM

a. 

without

 factory XM

4

5

6

Operation  

Reference  

INFO

MENU

ENTER

P-TYPE

TRAF

MSG

BAND

SRCE

AUTO

TONE

BAL/FADE

AUTO
TONE

DISP

ADJ

RPT     RDM

1

2

3

4

5

6

SEEK

GMLAN 11-bit Radio Type “1”

BAND

SEEK

SEEK

REV

FWD

CD/

AUX

FAV

MENU

EQ

CAT

EJECT

GMLAN 11-bit Radio Type “2”

Simple-fi.

1

2

Confi gure DIP switches (see previous 
section).

Connect appropriate “T” or “Y” harness to 
GMPD4 module (see below for details on 
which harness you should use).

OR

3

Disconnect double multi-pin factory 
connectors from your factory radio (see 
page below for details).

Disconnect 16-pin factory connector from 
your factory XM module.

a. 

without

 factory XM

b. 

with

 factory XM

Installation

GMLAN 11-bit Radio Visual Reference

Use the diagrams on the following page as a general visual reference to differentiate between GMLAN 11-bit radios of 

type “1”

 and 

type “2”

. Please note that your radio’s controls may differ slightly.

GMLAN 29-bit Navigation Radio

standard screen view

Press and hold 

• 

W

SEEK

 while in XM mode to switch between factory XM and iPod/AUX input.

Press the 

• 

Center Folder

 (iPod songs, albums, artists, etc.) on the touchscreen to advance to the search-screen 

view.
Use the  

• 

TUNE

 [          ] knob to navigate through folders selected via the search-screen view.

Press 

• 

SEEK

X

 to select a displayed item for playback.

During playback, use the 

• 

W

SEEK

X

 buttons to move forward or back through the current iPod folder.

Press and hold the 

• 

W

SEEK

X

 buttons to FF or RW.  Press the buttons again to stop FF/RW.

During playback, turn the 

• 

TUNE

 [          ] knob to advance through songs by increments of 10.

search-screen view

Select 

• 

MUSIC

 to view iPod search options. Your iPod can be navigated by Playlist, Artist, Album, Genre, or All 

Songs simply by selecting one of these categories, then pressing the 

BACK

 button. 

Note: after pressing the 

BACK

 button on the touch-screen, you will return to the standard screen view.

Select 

• 

SOURCE

 to view audio source options. Select 

IPOD

 for iPod audio. Select 

AUX

 to switch to AUX input. 

Select 

RADIO

 to return to standard AM/FM/XM. 

Note: changes do not take effect until you press the 

BACK

 button 

on the touch-screen.

Select 

• 

SWREV

 to view the current GMPD3 software revision.

GMLAN 29-bit Standard Radio

Press and hold 

• 

W

SEEK

 while in XM mode to switch between factory XM and iPod/AUX input.

Use the pushbuttons below the 

• 

IPOD

 and 

AUX

 labels on the display to switch between iPod and AUX input.

Press the 

• 

CAT

 button to show folders on the display for iPod playlists, Artist, Album, Genre, Song, and AUX input. 

Use the 

TUNE

 [          ] knob to navigate through folders.

Select a displayed item with 

• 

SEEK

X

.

During playback, use the 

• 

W

SEEK

X

 buttons to move forward or back through the current iPod folder.

Press and hold the 

• 

W

SEEK

X

 buttons to FF or RW.  Press the buttons again to stop FF/RW.

During playback, turn the 

• 

TUNE

 [          ] knob to advance through songs by increments of 10.

Press the 

• 

INFO

 [          ] button to display Song number, Name, Artist, and Album.

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