CONNECTIONS
DIN jack:
• Disregard the DIN jack, it will not be used in this application.
Note: The relay attached to the GMOS-MOST-02 harness is only for audible turn signal clicks. No
extra steps are required to retain this feature, so leave the relay as-is.
From the backup camera harness to the aftermarket radio:
• If the vehicle is equipped with a factory backup camera, connect the Yellow RCA jack to the
backup camera input.
(CONT.)
INSTALLATION
With the key in the off position:
• Locate the radio brain and Human Machine Interface module (HMI):
Corvette:
• Radio Brain: Passenger foot-well
• HMI: Left side of dash
Impala:
• Radio Brain & HMI: Under passenger side dashboard
• Connect the GMOS-MOST-02 harness to the 20-pin Gray connector, and 8-pin Light Gray
connector, removed from the radio brain.
• Connect the backup camera harness to the 12-pin Gray connector removed from the
HMI module.
• Connect the 16-pin harness with stripped leads, and the GMOS-MOST-02 harness, into the
GMOS-MOST-02 interface.
• If the vehicle is equipped with a media player, connect the 10-pin jumper harness to the
connector removed from the media player.
Note: If also installing an ASWC-1, connect it after you program and test the GMOS-MOST-02,
with the key in the off position.
REV. 9/28/2018 INSTGMOS-MOST-02
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