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

Power, Ground, Serial Data, Antennas, and Voice Recorder


Object Number: 1645360  Size: FS
Master Electrical Component List
OnStar Description and Operation
Control Module References
VCIM to Inside Rearview Mirrors
Cellular Communication Schematic Icons
Cellular Communication Schematic Icons
Cellular Communication Schematic Icons
G302
Figure 2:

VCIM to Inside Rearview Mirror


Object Number: 1645367  Size: FS
Master Electrical Component List
OnStar Description and Operation
Control Module References
Power, Ground, Serial Data, Antennas, and Voice Recorder
Fuse Block - Underhood BATT MAIN 1 Fuse, Fuse Block - I/P PK LAMPS, DISPLAYS, CHMSL/BKUP, INT LIGHT, RFA/MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, and CANISTER Fuses and PK LP Relay
Fuse Block - Underhood ABS, TRANS SOL, PCM, SIR, and DISPLAY Fuses, CRANK Relay, and Fuse Block - I/P CRUISE SW Fuse
Fuse Block - Underhood BATT MAIN 1 Fuse, Fuse Block - I/P PK LAMPS, DISPLAYS, CHMSL/BKUP, INT LIGHT, RFA/MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, and CANISTER Fuses and PK LP Relay
Data Link Connector (DLC) Schematics L26
Data Link Connector (DLC) Schematics LY7
Cellular Communication Schematic Icons
Cruise Control Schematics L26
Cellular Communication Schematic Icons
Cruise Control Schematics LY7
G202