GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Keyless Entry and Remote Start


Object Number: 1921735  Size: FS
Master Electrical Component List
Keyless Entry System Description and Operation
Control Module References
Garage Door Opener
Figure 2:

Garage Door Opener


Object Number: 1921737  Size: FS
Master Electrical Component List
Garage Door Opener Description and Operation
Control Module References
Keyless Entry and Remore Start