Axxess GMOS-LAN-012 Service manual

CAUTION! All accessories, switches, climate
controls panels, and especially air bag indicator
lights must be connected before cycling the
ignition. Also, do not remove the factory radio
with the key in the on position, or while the
vehicle is running.
GMOS-LAN-012
INSTALLATION INSTRUCTIONS
AxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 7/6/18 INSTGMOS-LAN-012
INTERFACE FEATURES
TOOLS REQUIRED
• Crimping tool and connectors, or solder gun,
solder, and heat shrink
• Tape • Wire cutter • Zip ties
TABLE OF CONTENTS
Connections to be made ................................... 3-4
Installing the GMOS-LAN-012 ................................5
Programming the GMOS-LAN-012 ........................5
Adjusting the GMOS-LAN-012 ...............................5
Extra features ........................................................6
Troubleshooting .....................................................7
GM LAN-29 Data Interface 2006-up*
APPLICATIONS
See inside front cover
• Provides accessory power (12-volt 10-amp)
• Maintains the retained accessory power (R.A.P.) feature
• Can be used in non-amplified, or analog/digital amplified models
• Retains warning chimes
• Provides NAV outputs (parking brake, reverse, mute, speed sense)
• Pre-wired ASWC-1 harness (ASWC-1 sold separately)
• Retains OnStar/OE Bluetooth
• Adjustable volume for chimes and OnStar
• Retains balance and fade†
• Retains the factory backup camera, satellite radio, and AUX-IN
• Satellite radio information will be displayed through the driver
information center (D.I.C.)
• Micro “B” USB updatable
*Visit AxxessInterfaces.com for up-to-date vehicle specific applications.
• GMOS-LAN-012 interface • GMOS-LAN-012 harness
• 16-pin harness with stripped leads
• 4-pin to 4-pin resistor pad harness
• Back-up camera harness • Antenna adapter
INTERFACE COMPONENTS
† Excluding digital amplified models

2
APPLICATIONS
BUICK
Enclave 2008-2017
Lucerne 2006-2011
Cadillac
DTS‡ 2006-2011
Escalade‡ 2007-2011
Escalade ESV‡ 2007-2011
Escalade EXT‡ 2007-2011
SRX‡ 2007-2009
CHEVROLET
Avalanche* † 2007-2013
Captiva Sport 2012-2014
Equinox 2007-2009
Express** 2008-up
Impala Limited 2014
Impala 2006-2013
Monte Carlo 2006-2007
Silverado 2500/3500* † 2014
Silverado (new body)* † 2007-2013
Suburban* † 2007-2014
Tahoe* † 2007-2014
Traverse 2009-2017
GMC
Acadia 2007-2016
Acadia Limited 2017
Savana** 2008-up
Sierra 2500/3500* † 2014
Sierra (new body)* † 2007-2013
Yukon* † 2007-2014
HUMMER
H2‡ 2008-2009
PONTIAC
Torrent 2007-2009
SATURN
Outlook 2007-2010
Vue 2008-2010
SUZUKI
XL-7 2007-2009
* If the vehicle comes equipped with factory navigation in the 2012-2014 models, you must use either the GMOS-LAN-08 for non-amplified models, or GMOS-LAN-07 for amplified models.
** If the vehicle comes equipped with factory navigation in the 2013-2015 models, you must use either the GMOS-LAN-08 for non-amplified models, or GMOS-LAN-07 for amplified models.
† These vehicles have a digital amp option. Please refer to the Service Parts Identification sticker located in the glove box. If the codes STZ, UQS, or Y91 are present, then you have a digital amplifier.
‡ These vehicle come standard with a digital amplifier.

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REV. 7/6/2018 INSTGMOS-LAN-012
CONNECTIONS TO BE MADE
From the 16-pin harness with stripped leads to the aftermarket radio:
• Connect the Red wire to the accessory wire.
Note: If installing either an ASWC-1 or AX-LCD (both sold separately), connect the (2) Red
wires from the GMOS-LAN-012 harness as well.
• Connect the Orange/White wire to the illumination wire. (If the aftermarket radio has no
illumination wire, tape off the Orange/White wire).
• Connect the Blue/White wire to the amp turn on wire (this wire must be connected to hear
sound from the factory amplifier).
• Connect the Brown wire to the mute wire of the aftermarket radio. If the radio has no mute
wire, tape it off and disregard it.
• Connect the White wire to the left front positive speaker output.
• Connect the White/Black wire to the left front negative speaker output.
• Connect the Gray wire to the right front positive speaker output.
• Connect the Gray/Black wire to the right front negative speaker output.
Connect the following 4 wires ONLY if your vehicle comes equipped with a digital amplifier:
• Connect the Green wire to the left rear positive speaker output.
• Connect the Green/Black wire to the left rear negative speaker output.
• Connect the Purple wire to the right rear positive speaker output.
• Connect the Purple/Black wire to the right rear negative output.
The following (3) wires are for an aftermarket multimedia/navigation radio that provide these
wires (if not required, tape them off and disregard them):
• Connect the Light Green wire to the parking brake wire, if applicable.
• Connect the Blue/Pink wire to the speed sense wire (V.S.S.), if applicable.
• Connect the Green/Purple wire to the reverse wire, if applicable.
Continue on the next page

4
For non-amplified models ONLY:
• Cut the resistors off from the Green, Green/Black, Purple, and Purple/Black wires below the
heat shrink.
• Connect the Green wire to the left rear positive speaker output.
• Connect the Green/Black wire to the left rear negative speaker output.
• Connect the Purple wire to the right rear positive speaker output.
• Connect the Purple/Black wire to the right rear negative output.
Note: The 4-pin to 4-pin resistor pad harness will not be used in this application.
Note: The relay attached to the GMOS-LAN-012 harness is only for audible turn signal clicks.
No extra steps are required to retain this feature, so leave the relay as-is.
12-pin pre-wired ASWC-1 harness:
• This harness is to be used along with the optional ASWC-1 (not included) to retain steering
wheel controls. If the ASWC-1 is not being used, disregard this harness. If it will be used,
please refer to the ASWC-1 instructions for radio connections and programming. Disregard
the harness that comes with the ASWC-1.
DIN jack:
• The DIN jack is to be used with the optional AX-LCD (sold separately) to retain satellite radio information
for models that do not retain this information in the driver’s information center. The AX-LCD can also be
used to view which factory sources are active; rear seat entertainment, satellite radio, AUX-IN
.
From the back-up camera harness to the aftermarket radio:
• If the vehicle comes equipped with a factory back-up camera, connect the Yellow RCA jack
to the aftermarket radios back-up camera video input.
• Activate the back-up camera video input on your radio if required.
From the GMOS-LAN-012 harness:
• Connect the Black wire to the ground wire.
• Connect the Yellow wire to the battery wire.
• If installing either an ASWC-1 or AX-LCD (both sold separately), connect the (2) Red wires to
accessory power.
• The Black/Yellow wire is used for OnStar level adjustment for models that do not come
equipped with steering wheel controls. See OnStar Level Adjustment for further instructions.
• Connect the RCA jacks to the audio AUX-IN (if so equipped).
Note: This will only be required if you care to retain the factory AUX-IN, or satellite radio.
The following wiring is ONLY required if your vehicle DOES NOT come equipped with a
digital amplifier:
For analog amplified models ONLY:
• Connect the Green wire to the left rear positive speaker output.
• Connect the Green/Black wire to the left rear negative speaker output.
• Connect the Purple wire to the right rear positive speaker output.
• Connect the Purple/Black wire to the right rear negative output.
• Disconnect the 4-pin harness located between the 14-pin and 22-pin harness, and then
connect the supplied 4-pin to 4-pin resistor pad harness.
CONNECTIONS TO BE MADE (CONT.)

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REV. 7/6/2018 INSTGMOS-LAN-012
With the key in the off position:
• Connect the 16-pin harness with stripped leads, and the GMOS-LAN-012 harness, into the
interface.
• If an ASWC-1 (sold separately) will be used, do not connect it until the GMOS-LAN-012 is
programmed and fully functional.
Attention! Do not connect the GMOS-LAN-012 harness to the wiring harness in the vehicle just yet.
INSTALLING THE GMOS-LAN-012 ADJUSTING THE GMOS-LAN-012
For the steps below, the L.E.D. located inside the interface can only be seen while active. The
interface does not need to be opened to see the L.E.D.
1. Start the vehicle.
2. Connect the GMOS-LAN-012 harness to the wiring harness in the vehicle. The L.E.D. will
initially be Green to indicate the interface is powered.
3. After a few seconds the L.E.D. will turn on solid Red while the interface automatically
programs to the vehicle. The radio will shut off at this point. This process should take 5 to 30
seconds.
4. After the interface is programmed, the L.E.D. will turn on solid Green, and the radio will
come back on, indicating programming was successful.
5. Test all functions of the installation for proper operation, before reassembling the dash.
6. If the interface fails to function, refer to “Troubleshooting”.
PROGRAMMING THE GMOS-LAN-012
Audio level adjustment (digital amplified models only):
• With the vehicle and radio turned on, turn the volume up 3/4 of the way.
• With a small flat-blade screwdriver, adjust the potentiometer clockwise to raise the audio
level; counterclockwise to lower the audio level.
• Once at a desired level, audio level adjustment is complete.
Chime level adjustment:
• With the vehicle on, turn it off and leave the keys in ignition. Open the driver’s door; chimes
will be heard.
• Wait 10 seconds, and then with a small screwdriver, turn the potentiometer clockwise to
raise the chime level; counterclockwise to lower the chime level.
• When the chime is at a desired level, remove the keys from the ignition. This will lock the
chime volume at its current level.
OnStar level adjustment:
• Press the OnStar button to activate it.
• While OnStar is speaking, press the VOLUME UP or VOLUME DOWN buttons on the steering
wheel to raise or lower the OnStar level.
• If the vehicle does not come equipped with steering wheel controls, find the Black/Yellow
wire on the GMOS-LAN-012 harness.
• While OnStar is speaking, tap the Black/Yellow wire to ground. Once the OnStar level is set,
it will stay at that level until the Black/Yellow wire is tapped to ground again.

6
AUX-IN, RSE and SAT:
• If the vehicle comes equipped with AUX-IN, rear seat entertainment, or satellite radio, the
GMOS-LAN-012 can retain these features.
Notes when retaining the AUX-IN:
• The AUX-IN can only be used if it is a stand-alone AUX-IN.
• If the vehicle comes equipped with an AUX-IN and a USB port, neither can be retained.
• Change the source of the radio to AUX-IN; the satellite radio will start playing.
• The display in the driver’s information center, or the optional AX-LCD (sold separately) will
display the satellite radio information.
• Listed below are the functions of the AX-LCD while using satellite radio:
Arrow up—Channel up
Arrow down—Channel down
Enter—Selects current item on the screen
Return/ESC—Exits to the previous screen
• To access advanced features of the satellite radio, press and hold the SOURCE button on the
steering wheel for 3 seconds.
Note: If the vehicle is not equipped with steering wheel controls, the AX-LCD will be required
for this feature.
• Listed below are the functions of the steering wheel control buttons while accessing the
advanced features:
• SEEK UP – Scrolls menu up.
• SEEK DOWN – Scrolls menu down.
• VOLUME UP- Enter
• Listed below are the advanced menu options:
• Show Text - Exits menu.
• Set Tuning Mode - Allows the user to select tuning by either a preset, or a channel.
• Set Preset – Allows the user to program presets.
• Set Display - Allows user to choose what satellite radio information is displayed.
Note: If using the AX-LCD, SEEK UP controls the top line on the display; SEEK DOWN
controls the bottom line.
• Set Satellite Radio Text Mode - Allows user to set the display length of the satellite radio
information. Options are On, Off, or 5 seconds (default is 5 seconds).
• To exit, press and hold the SOURCE button on the steering wheel for 3 seconds.
• To access AUX-IN or rear seat entertainment, press and hold the SOURCE button on the
steering wheel for 2 seconds. This will switch to the next source available. Each time the
SOURCE button is pressed for 2 seconds, the source will change. The sequence of sources
are SAT/RSE/AUX-IN. The driver’s information center, or the AX-LCD, will provide a visual
confirmation of which source is active.
EXTRA FEATURES

7
REV. 7/6/2018 INSTGMOS-LAN-012
Resetting the Axxess interface
1. The Blue reset button is located inside the Axxess interface, between the two connectors.
The button is accessible outside the Axxess interface, no need to open the Axxess interface.
2. Press and hold the reset button for (2) seconds, then let go to reset the Axxess interface.
3. Refer to “Programming the GMOS-LAN-012” from this point.
TROUBLESHOOTING

KNOWLEDGE IS POWER
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enrolling in the most recognized and respected
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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
IMPORTANT
If you are having difficulties with the installation of this product,
please call our Tech Support line at 1-800-253-TECH. Before doing
so, look over the instructions a second time, and make sure the
installation was performed exactly as the instructions are stated.
Please have the vehicle apart and ready to perform troubleshooting
steps before calling.
AxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 7/6/18 INSTGMOS-LAN-012
INSTALLATION INSTRUCTIONS
GMOS-LAN-012