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9
SIR-GM1 Operation and Installation Guide
9
SIR-GM1 Installation Guide
FILTER &
FUSEBOX
OUT
IN
Antenna (21’ cable) - Mount on
Roof of Vehicle
Right-angle SMB
Connector
NOTE: If your vehicle is equipped with a factory satellite radio tuner and you are using the
included ‘T-harness interface cable’ for installation, you must disconnect the factory satellite
radio tuner at the tuner box. Otherwise, operational errors will occur while using the SIR-GM1.
Factory GM Class-2 Radio
Connect YELLOW wire to the Battery
Positive or other good B+ source
Factory bus connector
(Vehicle Side)
Connect Black wire to
the a solid Chassis
Ground (as short as
possible)
SIR-GM1
Connector
T-Harness
Interface Cable
Power Harness
with Filter
Factory bus connector
(Headunit Side)
1-AMP Fuse located
inside noise filter
1-AMP ATC Fuse