GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Corvette 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 OnStar Schematics
Figure 1:

Antenna, DLC, Ground, Power and User Inputs
Object Number: 1852101 Size: FS
Master Electrical Component List
OnStar Description and Operation
Control Module References
Audio Output
Fuse Block - Underhood Fuse BATT5 BCM Fuses: DRIV DR SW, IGN SW/INTR SENS, ONSTAR, TELE SW/MEM SEAT MOD, and TPA
Class 2
GMLAN - M/T
GMLAN - A/T
Inside Rearview Mirror Schematics
Passenger Compartment Lamps
G202, 1 of 2
G104, G106, and G303
Figure 2:

Audio Output
Object Number: 1852103 Size: FS
Master Electrical Component List
OnStar Description and Operation
Control Module References
Antenna, DLC, Ground, Power and User Inputs