GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2003 🢒 Aurora 🢒 Body and Accessories 🢒 Doors 🢒 OnStar Schematics
Figure 1:

Power and Ground
Object Number: 814953 Size: FS
Master Electrical Component List
Keyboard Microphone Signals
Serial Data Class 2
G401 (2 of 2)
Battery Feed to the Fuse Block-Rear
Battery Feed to the Fuse Block-Rear
G303, G305, G310 and G404
Figure 2:

Keypad Microphone Signals
Object Number: 797928 Size: FS
Master Electrical Component List
Power and Ground
G402
G402
Cellular Communication Schematic Icons