GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Yukon XL - 2WD 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Remote Function Schematics
Figure 1:

Keyless Entry
Object Number: 2075582 Size: FS
Figure 2:

Garage Door Opener
Object Number: 2075579 Size: FS