Owner's Manual
GMOS-MOST-01
INSTALLATION INSTRUCTIONS
AxxessInterfaces.com © COPYRIGHT 2021 METRA ELECTRONICS CORPORATION REV. 3/17/21 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 2014-2021
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 (I05 / I06) 2015-2018
Silverado 1500
(I03 / I05 / I06) 2014-2018
Silverado 2500/3500
(I03 / I05 / I06) 2015-2019
Silverado LD (I05 / I06) 2019
Suburban 2015-2021
Tahoe 2015-2020
GMC
Canyon 2015-2018
Sierra 1500
(I03 / I05 / I06) 2014-2018
Sierra 2500/3500
(I03 / I05 / I06) 2015-2019
Sierra Limited (I05 / I06) 2019
Yukon / Yukon XL 2015-2020
• 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