GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Yukon Denali 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Liftgate Schematics
Figure 1:

Module Power, Ground, Serial Data, and Front Switch (E61)
Object Number: 2075554 Size: FS
Figure 2:

Liftgate Motor Controls (E61)
Object Number: 2075558 Size: FS