GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Envoy - 2WD 🢒 Safety and Security 🢒 Remote Functions 🢒 Remote Function Schematics
Figure 1:

Keyless Entry
Object Number: 1923799 Size: FS
Master Electrical Component List
Keyless Entry System Description and Operation
Control Module References
Garage Door Opener - UG1
Figure 2:

Garage Door Opener
Object Number: 1923803 Size: FS
Master Electrical Component List
Garage Door Opener Description and Operation
Control Module References
Keyless Entry