Axxess GMOS-100i User manual

© COPYRIGHT 2004-2010 METRA ELECTRONICS CORPORATION
1-800-221-0932 axxessinterface.com
INSTALLATION INSTRUCTIONS FOR PART GMOS-100i
The GMOS-100i which is USB updatable,is a replacement interface
designed to retain Onstar, retain the warning chimes that are normally
lost when the OEM radio is removed, retain factory installed satellite
radio(XIA-LCD is required and sold separately), and factory steering
wheel controls (if equipped). It also provides a 12 volt accessory output
for proper aftermarket radio operation. The GMOS-100i also provides
a Mute, Parking Brake, VSS or Speed Sense, and a Reverse output
to make installing an aftermarket navigational radio simpler and less
time comsuming. One of three additional harnesses is
required to complete installation. Please see below.
*Read Important Warning On Page 1
Before Attempting Any Installation*
APPLICATIONS
GMOS-100i
CLASS II-100
Buick
Allure 2005-09
Century 2004-05
Lacrosse 2005-09
Rainier 2004-07
Rendezvous 2002-07
Terraza 2005-08
Cadillac
Escalade 2003-06
Escalade Ext 2003-06
Chevrolet
Avalanche 2003-06
Cavalier 2000-05
Colorado 2004-09
Corvette 2005-10
Express 2003-07
Impala 2000-05
Malibu 2000-03
Malibu Classic 2004
Monte Carlo 2000-05
Silverado 2003-06
Silverado Classic 2007
Ssr 2003-06
Suburban 2003-06
Tahoe 2003-06
Trailblazer 2002-09
Uplander 2005-08
Venture 2000-05
GMC
Canyon 2004-09
Envoy 2002-09
Savana 2003-09
Sierra 2003-06
Sierra Classic 2007
Yukon/Xl/Denali 2003-06
Hummer
H2 2003-07
H3 2006-09
Isuzu
Ascender 2003-08
I Series 2006-08
Oldsmobile
Alero 2001-04
Bravada 2002-04
Intrigue 2002
Silhouette 2000-04
Pontiac
Aztec 2001-05
Grand Am 2001-05
Grand Prix 2004-08
Montana 2000-2005
Sun re 2000-05
Saab
9-7x 2005-09
Saturn
Relay 2005-09
GMLAN11-100
Chevrolet
Cobalt 2007-11
HHR 2006-11
Malibu 2008-11
Pontiac
G5 2007-08
G6 2009
Solstice 2006-09
Saturn
Aura 2006-09
Sky 2006-09
GMLAN29-100
Buick
Enclave 2007-11
Lucerne 2006-11
Cadillac
Escalade 2007-11
DTS 2006-2011
SRX 2007-09
Chevrolet
Avalanche 2007-11
Equinox 2007-10
Express 2008-11
Impala 2006-2011
Monte Carlo 2006-07
Silverado (New Body)
2007-11
Suburban 2007-11
Tahoe 2007-11
Traverse 2009-11
GMC
Acadia 2007-11
Savanna 2008-11
Sierra (New Body)
2007-11
Yukon 2007-11
Hummer
H2 2008-09
Pontiac
Torrent 2007-09

INTERFACE COMPONENTS
TOOLS REQUIRED FOR INSTALLATION
•A) GMOS-100i Interface •B) 20 pin harness with stripped leads
•Cutting Tool •Tape •Crimping Tool •Connectors (I.E. butt-connectors, bell caps, ECT…)
AB
IGNITION
TERMINALS
WIRE
CUTTER
M3.5
M2.6
M3
M5
M4
ISO
6
2.5
1.5

GMOS-100i
Installing The Interface .............................................................. 1
Testing The GMOS-100i ............................................................. 3
KNOWLEDGE IS POWER
Enhance your installation and fabrication skills by
enrolling in the most recognized and respected
mobile electronics school in our industry.
Log onto www.installerinstitute.com or call
800-354-6782 for more information and take steps
toward a better tomorrow.
Metra recommends MECP certified
technicians
TABLE OF CONTENTS

*Important: Before beginning any of the following, disconnect the negative battery terminal
to prevent an accidental short circuit.
1
INSTALLING THE INTERFACE
From the 20 pin harness:
• Connect the Red wire to the ignition/accessory wire of the aftermarket radio.
• Connect the Orange/White wire to the illumination wire of the aftermarket radio. If the
aftermarket radio has no illumination wire just tape off the Orange/White wire.
• Connect the Blue/White wire to the amp turn on wire of the aftermarket radio.
• Connect the Brown wire to the mute wire of the aftermarket radio. If the aftermarket
radio does not have a Mute wire, tape up the Brown wire.
The Black/Yellow wire will be discussed later on in the instructions
For Non-Amplied Systems:
• Connect the White wire to the left front positive speaker output of the aftermarket radio
• Connect the White/Black wire to the left front negative speaker output of the aftermarket
radio
• Connect the Gray wire to the right front positive speaker output of the aftermarket radio
• Connect the Gray/Black wire to the right front negative speaker output of the
aftermarket radio
For Amplied Systems:
• Connect the White rca to the left front low level output of the aftermarket radio
• Connect the Gray rca to the right front low level output of the aftermarket radio
• Connect the Green rca to the left rear low level output of the aftermarket radio
• Connect the Violet rca to the right rear low level output of the aftermarket radio
The following wires are for the aftermarket radios that have navigation built in:
• Connect the Green wire to the parking brake wire of the aftermarket navigation radio.
• Connect the Blue/Pink wire to the VSS or speed sense wire of the aftermarket naviga-
tion radio.
• Connect the Green/Purple wire to the reverse wire of the aftermarket navigation radio.

2
POTENTIOMETERS
Chime/Turn signal Volume Adjustment
To adjust the chime volume, use a small screwdriver to rotate the potentiometer, located
on the 8 pin harness side of the interface (closest to 8 pin harness). Turn clockwise to
make the chime/turn signal louder and counterclockwise to make the chime/turn signal
softer. Turn signal will not be affected in non amplied or class II systems.
Overall Gain Level Adjustment
To adjust the overall audio volume of your vehicle, use a small screwdriver to rotate the
potentiometer, located on the 8 pin harness side (furthest away from 8 pin harness). Turn
clockwise to make gain louder and counterclockwise to make the gain softer.
Onstar Level Adjustment
To adjust the Onstar volume level nd the Black/Yellow wire on the 20 pin harness. Push
the blue Onstar button, while the voice is speaking tap the Black/Yellow wire to ground.
There are 4 volume settings for Onstar; once the 4th setting is reached and the Black/Yel-
low wire is tapped to ground it will automatically go back to the rst volume setting. Once
the volume is set it will stay at that volume until the Black/Yellow wire is tapped to ground
again.
This can be set during installation and then left alone.

3
If user adjustment is desired, a momentary contact switch (sold separately) can be added.
Connect one terminal from the switch to ground and the other terminal to the Black/Yellow
wire. The volume will change one level every time the switch is pressed.
TESTING THE GMOS-100i
Turn the ignition on, and then turn the aftermarket radio on.
Push the Onstar button, the radio should turn off (if mute wire is connected radio will mute)
and you should hear Onstar. Push the Onstar cancel button and the radio should come
back on.

NOTES

REV. 10/7//2010
1-800-221-0932 axxessinterface.com
© COPYRIGHT 2004-2010 METRA ELECTRONICS CORPORATION
INSTALLATION INSTRUCTIONS FOR PART GMOS-100i