GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 STS 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Inside Rearview Mirror Schematics
Figure 1:

Power and Ground
Object Number: 2062629 Size: FS
Figure 2:

Automatic Headlamp Dimming Signals
Object Number: 2062635 Size: FS