Axxess GMOS-MOST-01 User manual

GMOS-MOST-01
INSTALLATION INSTRUCTIONS
AxxessInterfaces.com © COPYRIGHT 2019 METRA ELECTRONICS CORPORATION REV. 10/7/19 INSTGMOS-MOST-01
Product Info
INTERFACE FEATURES
INTERFACE COMPONENTS
TOOLS REQUIRED
• Crimping tool and connectors, or solder gun,
solder, and heat shrink
• Small flat blade screwdriver • Tape
• Wire cutter • Zip ties • T-15 Torx screwdriver
TABLE OF CONTENTS
Connections ........................................................ 2-4
Installation .............................................................5
Programming .....................................................5-6
Audio level adjustment ........................................7
GM MOST® Amplifier Interface 2014-Up
APPLICATIONS
• Provides accessory power
(12-volt 10-amp)
• Maintains the retained
accessory power (R.A.P.) feature
• Retains OnStar / OE Bluetooth
• Retains warning chimes
• Provides NAV outputs (parking
brake, reverse, speed sense)
• Requires ASWC-1 (sold separately)
if steering wheel audio controls
are desired to be retained
• Retains the factory AUX-IN jack
• Retains the factory backup
camera
• Used in MOST® amplified
applications
• Retains balance
• Micro-B USB updatable
CHEVROLET
Colorado 2015-2018
Silverado 1500 2014-2018
Silverado 2500/3500 2015-2018
Suburban 2015-Up
Tahoe 2015-Up
GMC
Canyon 2015-2018
Sierra 1500 2014-2018
Sierra 2500/3500 2015-2018
Yukon / Yukon XL 2015-Up
• GMOS-MOST-01 interface
• GMOS-MOST-01 harness
• 16-pin harness with stripped leads
• Backup camera harness
• 10-pin jumper harness
• 12-pin jumper harness

2
CONNECTIONS
From the 16-pin harness with stripped leads to the aftermarket radio:
• Connect the Red wire to the accessory wire.
• Connect the Orange/White wire to the illumination wire. If the aftermarket radio does not
have an 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 Gray wire to the right front positive speaker output.
• Connect the Gray/Black wire to the right front negative speaker output.
• 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 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 speaker output.
The following (3) wires are only for multimedia/navigation radios that require these wires.
• Connect the Light Green wire to the parking brake wire.
• Connect the Blue/Pink wire to the speed sense wire.
• Connect the Green/Purple wire to the reverse wire.
• Tape off and disregard the Brown wire, it will not be used in this application.
From the GMOS-MOST-01 harness to the aftermarket radio:
• Connect the Black wire to the ground wire.
• Connect the Yellow wire to the battery wire.
• If retaining the factory AUX-IN jack is desired, connect the Red and White RCA jacks to the
audio AUX-IN jacks from the aftermarket radio.
Note: a) The jack can only be used if it is a single jack.
b) If the jack has a USB port as well, neither can be retained.
• Disregard the Red wire, it will not be used in this application.
• Tape off and disregard the 3.5mm jack, it will not be used in this application.
DIN jack:
Disregard the DIN jack, it will not be used in this application.
Note: The relay attached to the GMOS-MOST-01 harness is only for audible turn signal
clicks. No extra steps are required to retain this feature, so leave the relay as-is.
Continued on the next page

3
REV. 10/7/2019 INSTGMOS-MOST-01
CONNECTIONS (CONT)
Continued on the next page
From the 10-pin or 12-pin jumper harness to the vehicle:
If the vehicle does not have a CD or DVD-Drive, disregard these steps.
For models without rear seat entertainment:
• Connect the female Black 10-pin jumper harness, to the male Black 10-pin harness
removed from the CD-Drive.
For models with rear seat entertainment:
• Connect the female Black 12-pin jumper harness, to the male Black 12-pin harness
removed from the DVD-Drive.
Note: Even though this step must be done for models with rear seat entertainment,
the rear seat entertainment system will not be retained by this interface.
(Figure A)
Human Machine Interface module
(Arrow points to the location)
(Figure B)
From the backup camera harness:
To the aftermarket radio:
• Connect the Yellow RCA jack to the backup camera input.
To the vehicle:
• Connect the backup camera harness, to the male Gray connector removed from the
Human Machine Interface module (HMI). (Figure A)
For the Chevy Colorado and GMC Canyon:
• The HMI module is located in the radio cavity, down low.
For all other models:
• The HMI module is located behind the glove box. There are (2) modules behind the glove
box. The HMI module is behind the metal dashboard support. (Figure B)
• Drop the glove box down by first removing the retaining cable on the right side. Then
squeeze the glove box sides and gently pull down.
• Remove (6) T-15 Torx screws securing the plastic panel now exposed.

4
CONNECTIONS (CONT)
ASWC-1 wiring:
If installing an ASWC-1 (sold separately), refer to the following instructions for wiring.
• Connect the Black wire to chassis ground.
• Connect the Red wire to accessory power.
• Connect the Pink wire, to the Green/Black wire in the 8-pin black connector located in the
steering column. (Figure A)
• For the radios listed below: Connect the 3.5mm adapter priovided with the ASWC-1, to the
male 3.5mm jack from the ASWC-1. Any remaining wires tape off and disregard.
• Eclipse: Connect the steering wheel control wire, normally Brown, to the Brown/White
wire of the connector. Then connect the remaining steering wheel control wire, normally
Brown/White, to the Brown wire of the connector.
• Metra OE: Connect the steering wheel control Key 1 wire (Gray) to the Brown wire.
• Kenwood or select JVC with a steering wheel control wire: Connect the Blue/Yellow wire
to the Brown wire.
• XITE: Connect the steering wheel control SWC-2 wire from the radio to the Brown wire.
• Parrot Asteroid Smart or Tablet: Connect the 3.5mm jack to the AX-SWC-PARROT (sold
separately), then connect the 4-pin connector from the AX-SWC-PARROT into the radio.
Note: The radio must be updated to rev. 2.1.4 or higher software.
• Universal “2 or 3 wire” radio: a) Connect the steering wheel control wire, referred to as
Key-A or SWC-1, to the Brown wire of the connector. Then connect the remaining steering
wheel control wire, referred to as Key-B or SWC-2, to the Brown/White wire of the
connector. If the radio comes with a third wire for ground, disregard this wire.
Note: After the interface has been programmed to the vehicle, refer to the manual provided with
the radio for assigning the SWC buttons. Contact the radio manufacturer for more information .
• For all other radios: Connect the 3.5mm jack into the jack on the aftermarket radio
designated for an external steering wheel control interface. Refer to the manual provided
with the aftermarket radio if in doubt as to where the 3.5mm jack goes to.
(Figure A)
Green/Black wire

5
REV. 10/7/2019 INSTGMOS-MOST-01
INSTALLATION
With the key in the off position:
• Connect the 16-pin harness with stripped leads, and the GMOS-MOST-01 harness into the
interface.
• Connect the GMOS-MOST-01 harness to the wiring harness in the vehicle.
• If an ASWC-1 (sold separately) will be used, do not connect it until the GMOS-MOST-01 is
programmed and fully functional.
GMOS-MOST-01 programming:
Attention! If the interface loses power for any reason, the following steps will need to be
performed again.
• Turn the key (or push-to-start button) to the ignition position and wait until the radio comes on .
Note: If the radio doesn’t come on within 60 seconds, turn the key to the off position,
disconnect the interface, check all connections, reconnect the interface, then try again.
• Turn the key to the off position, then to the accessory position. Test all functions of the
installation for proper operation, before reassembling the dash.
ASWC-1 programming:
1. With the key still cycled on, plug the ASWC-1 in. The LED in the ASWC-1 will flash rapidly.
2. Tap the Volume Up button on the steering wheel at a heartbeat pace until the LED stop
flashing rapidly.
3. After approximately 2 seconds there will be a series of 7 Green flashes, some short, and
some long. The long flashes represent the wires that are connected to the ASWC-1.
4. The LED will pause for another 2 seconds, then flash Red up to (18) times depending on
which radio is connected to the ASWC-1. Refer to the L.E.D. feedback section for information.
5. This is the end of the auto detection stage. If the ASWC-1 detected the vehicle and the radio
successfully, the L.E.D. will light up solid.
6. Test the steering wheel controls for proper operation. Refer to ASWC-1 documents online for
customizing the buttons, if so desired.
PROGRAMMING
Disregard these plugs and red wire,
they will not be used in this application.
Radio Connections Radio Connections
Vehicle Connectors
Chime Relay:
No connections required
LD-2NAVAMP
Continued on the next page

6
L.E.D. feedback
The (18) Red L.E.D. flashes represent which brand radio the ASWC-1 is connected to. Each flash represents a different radio Manufacturer. For example, if you are installing a JVC radio, the ASWC-1 will
flash Red (5) times, and then stop. Following is a legend that dictates which radio Manufacturer corresponds to which flash.
L.E.D. feedback legend
Flash Count Radio
1 Eclipse (type 1) †
2 Kenwood ‡
3 Clarion (type 1) †
4 Sony / Dual
5 JVC
6 Pioneer / Jensen
7 Alpine *
8 Visteon
9 Valor
Flash Count Radio
10 Clarion (type 2) †
11 Metra OE
12 Eclipse (type 2) †
13 LG
14 Parrot **
15 XITE
16 Philips
17 TBD
18 JBL
* If the ASWC-1 flashes Red (7) times, and you do not have an Alpine radio connected to it, that
means the ASWC-1 doesn’t detect a radio connected it. Verify that the 3.5mm jack is connected
to the correct steering wheel jack/wire in the radio.
** The AX-SWC-PARROT is required (sold separately). Also, the Parrot radio must be updated to
rev. 2.1.4 or higher through www.aparrot.com.
† If you have a Clarion radio and the steering wheel controls do not work, change the radio type
to the other Clarion radio type; same for Eclipse. Refer to the ASWC-1 document online for
changing the radio type.
‡ If you have a Kenwood radio and the L.E.D. feedback comes back as showing as a JVC radio, change
the radio type to a Kenwood. Refer to the ASWC-1 document online for changing the radio type.
PROGRAMMING (CONT)

7
REV. 10/7/2019 INSTGMOS-MOST-01
AUDIO LEVEL ADJUSTMENT
• With the vehicle and radio turned on, turn the volume up 3/4 of the way.
• Locate the end of the GMOS-MOST-01, where the 16-pin harness with stripped leads connects to.
• 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.

AxxessInterfaces.com © COPYRIGHT 2019 METRA ELECTRONICS CORPORATION REV. 10/7/19 INSTGMOS-MOST-01
INSTALLATION INSTRUCTIONS
GMOS-MOST-01
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
Having difficulties? We’re here to help.
Contact our Tech Support line at:
386-257-1187
Or via email at:
[e-mail]
Tech Support Hours (Eastern Standard Time)
Monday - Friday: 9:00 AM - 7:00 PM
Saturday: 10:00 AM - 7:00 PM
Sunday: 10:00 AM - 4:00 PM

GMOS-MOST-01
INSTRUCCIONES DE INSTALACIÓN
AxxessInterfaces.com © COPYRIGHT 2019 METRA ELECTRONICS CORPORATION REV. 10/7/19 INSTGMOS-MOST-01
Información del producto
CARACTERÍSTICAS DE LA INTERFASE
COMPONENTES DE LA INTERFASE
HERRAMIENTAS REQUERIDAS
• Herramienta de ponchadora y conectores, o
pistola de soldadura, soldadura y termocontracción
• Cinta • Cortacables • Zip lazos
• Pequeño destornillador de cabeza plana
• Destornillador Torx T-15
INDICE
Conexiones ......................................................... 2-4
Instalación ..............................................................5
Programación .....................................................5-6
Ajuste del nivel de audio ......................................7
GM MOST® Interfase del amplificador 2014 y mas
APLICACIONES
• Provee corriente de accesorios
(12 voltios 10 amperes)
• Mantiene la característica de energía
de accesorio retenida (R.A.P.)
• Retiene OnStar / Bluetooth de
fabricante original
• Retiene campanillas de advertencia
• Proporciona salidas de NAV
(freno de mano, reversa,
sensor de velocidad)
• Requiere ASWC-1 (se vende por
separado) si se desea conservar
los controles de audio del volante
• Retiene el AUX-IN de fábrica
• Retiene la cámara de reversa
de fábrica
• Se utiliza en aplicaciones
MOST® am plificado
• Retiene el balance
• Actualizable por micro-B USB
CHEVROLET
Colorado 2015-2018
Silverado 1500 2014-2018
Silverado 2500/3500 2015-2018
Suburban 2015 y Mas
Tahoe 2015 y Mas
GMC
Canyon 2015-2018
Sierra 1500 2014-2018
Sierra 2500/3500 2015-2018
Yukon / Yukon XL 2015 y Mas
• Interfase GMOS-MOST-01
• Arnés GMOS-MOST-01
• Arnés de 16 pins con conectores pelados
• Arnés de cámara de reversa
• Arnés puente de 10 pins
• Arnés puente de 12 pins

2
CONEXIONES
Desde el arnés de 16 pins con conectores pelados al radio de mercado secundario:
• Conecte el cable rojo con el cable de accesorios.
• Conecte el cable anaranjado/blanco con el cable de iluminación. Si el radio de mercado
secundario no tiene cable de iluminación, encinte el cable anaranjado/blanco.
• Conecte el cable azul/blanco al cable de encendido del amplificador. Este cable debe estar
conectado para escuchar sonido del amplificador de fábrica.
• Conecte el cable gris con la salida positiva de la bocina derecha del frente.
• Conecte el cable gris/negro con la salida negativa de la bocina derecha del frente.
• Conecte el cable blanco con la salida positiva de la bocina izquierda delantera.
• Conecte el cable blanco/negro con la salida negativa de la bocina izquierda delantera.
• Conecte el cable verde con la salida de la bocina positiva izquierda de atrás.
• Conecte el cable verde/negro con la salida negativa de la bocina izquierda de atrás.
• Conecte el cable púrpura con la salida positiva de la bocina derecha de atrás.
• Conecte el cable púrpura/negro con la salida negativa de la bocina derecha de atrás.
Los siguientes (3) cables son para radios de mercado secundario con multimedios/navegación
que tienen estos cables:
• Conecte el cable verde claro al cable de freno de mano.
• Conecte el cable azul/rosa al cable del sensor de velocidad.
• Conecte el cable verde/púrpura al cable de reversa.
• Encinte e ignore el cable marrón, no se utilizarán en esta aplicación
Desde el arnés GMOS-MOST-01 al radio de mercado secundario:
• Conecte el cable negro al cable de tierra.
• Conecte el cable amarillo al cable de la batería.
• Si desea retener la toma AUX-IN de fábrica, conecte las tomas RCA roja y blanca a las tomas
AUX-IN de audio de la radio no original.
Nota: (a) El conector sólo puede utilizarse si se trata de una sola toma.
(b) Si el conector también tiene un puerto USB, ninguno puede retenerse.
• Ignore el cable rojo; no se utilizará en esta aplicación.
• Encinte e ignore el connector de 3.5mm, no se utilizarán en esta aplicación
Conector DIN:
Ignore el conector DIN, no se utilizará en esta aplicación.
Nota: El relé adjunto a la arnés GMOS-MOST-01 únicamente es para los chasquidos audibles de la
señal direccional. No se requieren pasos adicionales para retener esta característica, así que deje
el relé como está.
Continua en la siguiente pagina