GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 SRX 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Trailer Connector/Provision Schematics
Figure 1:

Trailer Provisions (without EXP)
Object Number: 2063825 Size: FS
Figure 2:

Trailer Provisions (EXP)
Object Number: 2063827 Size: FS