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

Keyless Entry


Object Number: 1787491  Size: FS
Master Electrical Component List
Keyless Entry System Description and Operation
Control Module References
Universal Garage Door Opener
Underhood Fuse Block RBEC 1 and Rear Fuse Block AUX #2, BCK/UP LAMPS, CIG/AUX, HTD MIR, HTD SEAT, RKE/XM/DVD/UGD, RR DEFOG and S/ROOF Fuses
Low Speed Serial Data
Underhood Fuse Block RBEC 1 and Rear Fuse Block AUX #2, BCK/UP LAMPS, CIG/AUX, HTD MIR, HTD SEAT, RKE/XM/DVD/UGD, RR DEFOG and S/ROOF Fuses
Sedan
Extended Sedan
Door Lock Actuators
G304 and G305
G101 and G102
Figure 2:

Universal Garage Door Opener


Object Number: 1787493  Size: FS
Master Electrical Component List
Garage Door Opener Description and Operation (One LED)
Control Module References
Keyless Entry
Underhood Fuse Block RBEC 1 and Rear Fuse Block AUX #2, BCK/UP LAMPS, CIG/AUX, HTD MIR, HTD SEAT, RKE/XM/DVD/UGD, RR DEFOG and S/ROOF Fuses
Backup Lamps and License Lamps
G304 and G305
G304 and G305