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

Driver


Object Number: 1702420  Size: FS
Master Electrical Component List
Outside Mirror Description and Operation Power Mirrors
Control Module References
Passenger
Low Speed Bus - SP200 - 1 of 3
Inside Rearview Mirror Schematics
Figure 2:

Passenger


Object Number: 1814416  Size: FS
Master Electrical Component List
Outside Mirror Description and Operation Power Mirrors
Control Module References
Driver
Low Speed Bus - SP200 - 1 of 3