INSTALLATION INSTRUCTIONS FOR PART GMOS-04
GM amplified OnStar Class II Data Bus
Interface 2000-up
KIT FEATURES
• Provides accessory (12-volt 10-amp)
• Retains R.A.P. (retained accessory power)
• Used in amplified systems
• Retains chimes
• Provides NAV outputs (parking brake, reverse, mute, V.S.S.)
• ASWC-1 harness included (ASWC-1 not included)
• Retains OnStar/OE Bluetooth
• Adjustable volume for chimes and OnStar
• High level speaker input
• USB updatable
• Retains balance and fade
METRA. The World's best kits.™
GMOS-04
APPLICATIONS
See inside front cover
1-800-221-0932
INTERFACE COMPONENTS
GMOS-04 interface • 16-pin harness with
stripped leads • 18-pin harness to 12- and 24-pin
GM harness with stripped leads
TOOLS REQUIRED
• Cutting tool • Crimping tool • Tape • Connectors
(example: butt-connectors, bell caps, etc.)
CAUTION: Metra recommends disconnecting the
negative battery terminal before beginning any
installation. All accessories, switches, and especially
air bag indicator lights must be plugged in before
reconnecting the battery or cycling the ignition.
NOTE: Refer to the instructions included with the
aftermarket radio.
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