GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Corvette 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 HVAC Schematics
Figure 1:

Blower Controls
Object Number: 687423 Size: FS
Master Electrical Component List
Air Temperature Description and Operation
CompressorControls
Fuse Block-I/P Bussing (1 of 2)
Star Connectors
Fuse Block-I/P Bussing (1 of 2)
G202
Figure 2:

Compressor Controls
Object Number: 687425 Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Air Delivery/Temperature Control Power, Ground and DLC
BlowerControls
Fuse Block-Underhood Fuses 14, 13, 16, 15, 5 and Relays 43, 44, 35 and 42
G106 and G105
Star Connectors
Fuse Block-Underhood Bussing (2 of 2)
G101 and G102
Figure 3:

Air Delivery/Temperature Controls - Power, Ground and DLC
Object Number: 687500 Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Air Delivery/Temperature Controls (Actuator Controls)
CompressorControls
Star Connectors
G202
Fuse Block-I/P Bussing (1 of 2)
Air Delivery/Temperature Controls (Actuator Controls)
Air Delivery/Temperature Controls (Actuator Controls)
Figure 4:

Air Delivery/Temperature Controls - Actuator Control
Object Number: 687533 Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Air Delivery/TemperatureControls (Solenoid Controls)
Air Delivery/Temperature Control Power, Ground and DLC
Air Delivery/Temperature Control Power, Ground and DLC
Air Delivery/Temperature Control Power, Ground and DLC
Fuse Block-I/P Fuses 50, 14, 21, 22, 18 and Relay 44
Air Delivery/TemperatureControls (Solenoid Controls)
Figure 5:

Air Delivery/Temperature Controls - Solenoid Control
Object Number: 687535 Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Air Delivery/Temperature Controls (Vacuum Control)
Air Delivery/Temperature Controls (Actuator Controls)
Air Delivery/Temperature Controls (Actuator Controls)