GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Cavalier 🢒 Accessories 🢒 Cellular Communication 🢒 OnStar Schematics
Figure 1:

Antennas, Data Link, Ground and Power
Object Number: 876415 Size: FS
Master Electrical Component List
OnStar Description and Operation
Inside Rearview Mirror
Fuse Block Underhood, Batt 1 Fuse, Fuse Block I/P, MIR/DLC, RT HDLP, FLS/PASS, RDO/INTLP, RFA BATT, AMPL Fuses
Fuse Block Underhood, Batt 1 Fuse, Fuse Block I/P, MIR/DLC, RT HDLP, FLS/PASS, RDO/INTLP, RFA BATT, AMPL Fuses
Data Link Communication (DLC)
G102
Figure 2:

Inside Rearview Mirror
Object Number: 876417 Size: FS
Master Electrical Component List
OnStar Description and Operation
Antennas, Data Link, Ground and Power
G204
Cellular Communication Schematic Icons