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8

8

Connect iPod to GMPD2 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 

GMPD2 module (see page 3 for details). 

If your vehicle 

is not

 equipped with a factory XM tuner, connect the included “T” harness to the GMPD2 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 GMPD2 module and 

use the following steps suffi xed with 

b

.

If your vehicle 

is not

 equipped with a factory XM tuner, the GMPD2 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 GMPD2 

“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 GMPD2 “T” harness. 

If your vehicle 

is

 equipped with a factory XM tuner, the GMPD2 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 GMPD2 “T” harness.

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

3b

 to the matching location 

on the GMPD2 “Y” harness.

Connect the remaining 14-pin and 16-pin connectors on the GMPD2 “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 GMPD2 “Y” harness to the matching location on the factory XM 

module.

Connect the iPod dock connector cable to the GMPD2 module. You may also connect an optional AUX input to the RCA 

connectors on the GMPD2 module (white = LEFT, red = RIGHT).

Mount the GMPD2 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 GMPD3 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 GMPD2 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 and their corresponding functions are illustrated here; however, please note that these examples 

only represent the most common GM “Class II” radio interfaces—your radio’s controls may differ slightly. Please use the following 

section as a general operational guide for the GMPD2 interface and the following GM “Class II” radios.

GM “Class II” Standard Radio

Press and hold 

• 

Preset 6

 to switch between factory XM and iPod/AUX input.

Using the 

• 

BAND

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

Turn the 

• 

P-TYPE

 knob to display and advance through iPod playlists.

Select a displayed playlist with 

• 

SEEK

.

Use the 

• 

 

SEEK

X

 buttons to move forward or back through the current playlist.

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/DISPLAY

 knob to advance through songs by increments of 10. Press the knob 

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

GM “Class II” 6CD Radio

Press and hold Preset 6 to switch between factory XM and iPod/AUX input.

• 

Using the 

• 

BAND

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

Press 

• 

P-TYPE

 to display iPod playlists. Use the 

TUNE

 knob to advance through playlists.

Select a displayed playlist with 

• 

SEEK

X

.

Use the 

• 

W

SEEK

X

 buttons to move forward or back through the current playlist.

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/DISPLAY

 knob to advance through songs by increments of 10. Press the knob 

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

GM “Class II” Radio w/ LCD (non-Touch-screen)

Press and hold the 

• 

Lower Right Button

 to switch between factory XM and iPod/AUX input.

Using the 

• 

BAND

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

Press the 

• 

S

 button on the navigation joystick [         ] to display and advance through playlists. Select a displayed 

playlist with navigation joystick’s 

Center Button

.

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.

GM “Class II” Radio w/ LCD Touch-screen Interface

Press and hold the 

• 

Lower Right Button

 to switch between factory XM and iPod/AUX input.

Using the 

• 

BAND

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

Once the iPod is selected as your XM1 device, press the 

• 

W

SELECT

X

 buttons to display and advance through 

iPod playlists.
Select a displayed playlist with 

• 

SEEK

S

.

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 

• 

TUNE/DISPLAY

 knob (on the lower lefthand side of your radio) to advance through 

songs by increments of 10.  Press the knob 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.

Copyright© 2004-2008 SoundGate®. All Rights 
Reserved. SoundGate® is a registered trademark of 
Stillwater Designs, Inc. All other trademakrs are the 
property of their respective owners.

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!

• 

www.soundgate.com

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

1

1

2

2

Confi gure DIP switches (see previous 
section).

Connect appropriate “T” or “Y” harness to 
GMPD2 module (see below for details on 
which harness you should use).

OR

3

3

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

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

a. 

without

 factory XM

b. 

with

 factory XM

OR

4

4

Connect double multi-pin factory 
connectors to matching locations on the 
GMPD2 “T” harness.

a. 

without

 factory XM

Connect 16-pin factory connector to 
matching location on the GMPD2 “Y” 
harness.

b. 

with

 factory XM

6

6

7

7

Connect iPod Dock cable to the GMPD2. 
You may optionally connect an AUX input 
source as well.

Mount the GMPD2 (behind dash or glove 
compartment). Be careful not to drill into 
wiring or vehicle mechanisms.

OR

5

5

Connect GMPD2 “T” harness to factory 
radio.

Connect GMPD2 “Y” harness to factory 
XM module.

b. 

with

 factory XM

a. 

without

 factory XM

Installation

GM “Class II” Corvette Radio w/ LCD Touch-screen Interface

Press and hold the 

• 

Lower Right Button

 to switch between factory XM and iPod/AUX input.

Using the 

• 

XM 1/2

 button on the touchscreen’s source list, select XM1 for iPod; select XM2 for AUX input.

Once the iPod is selected as your XM1 device, press the 

• 

W

CAT

X

 buttons on the touchscreen to advance through 

iPod playlists.
Select a displayed playlist with 

• 

SEEK

S

.

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, Press the 

• 

INFO

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

GM “Class II” Equinox Radio

Press and hold Preset 6 to switch between factory XM and iPod/AUX input.

• 

Using the 

• 

BAND

 (or 

XM/AUX

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

Press 

• 

P-TYPE

 to display iPod playlists. Use the 

TUNE

 knob to advance through playlists.

Select a displayed playlist with 

• 

SEEK

X

 (or 

SEEK

S

).

Use the 

• 

W

SEEK

X

 (or 

T

SEEK

S

) buttons to move forward or back through the current playlist.

Press and hold the 

• 

W

SEEK

X

 (or 

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.

During playback, press the 

• 

MSG

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

4

5

6

Installation

Operation  

Operation  

Simple-fi.

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