Sirius Satellite Radio SIR-GM1 Manual

Cadillac CTS Installation Modification
The Cadillac CTS left channel audio is wired differently than all
other vehicles compatible with the SIR-GM1.The left channel audio
and ground wires are switched which can cause phasing and noise
problems.To correct this, a simple modification must be made to
the factory SDAR interface harness included with the SIR-GM1.
18
9
1
916
Wire side of the
connector
Normal Modified for CTS
1) Use a scribe to pop open the top
and bottom connector locking covers
SIR-GM1
Connector
Factory SDAR Interface Cable
2) use a scribe and apply slight
pressure to the pin to
release the connector
3) Swap Pins 3 and 10
(White and Black)
Pin 3
Pin 10
Pin 3
Pin 10
8
16