Sirius Satellite Radio SIR-GM1 Supplementary 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.
SIR-GM1
Connector
Normal
8
16
Pin 3
Pin 10

Factory SDAR Interface Cable

1) Use a scribe to pop open the top
and bottom connector locking covers
2) use a scribe and apply slight
pressure to the pin to
release the connector
3) Swap Pins 3 and 10
(White and Black)
1 8
9 16
Wire side of the
connector
Pin 3
Pin 10
Modified for CTS
1
9