GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra - 2WD 🢒 Body Systems 🢒 Vehicle Access 🢒 Door Control Module Schematics
Figure 1:

Power, Ground and Serial Data
Object Number: 2064612 Size: FS
Figure 2:

Door Lock, Window and Lighting System References
Object Number: 2064614 Size: FS
Figure 3:

Outside Rearview Mirror References
Object Number: 2064616 Size: FS
Figure 4:

Heated Seat References
Object Number: 2064619 Size: FS