GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Vivant 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 HVAC Schematics
Figure 1:

Blower Controls
Object Number: 1346323 Size: FS
Master Electrical Component List
Compressor Controls (Sirius D4)
Fuse Block - Underhood B+ Bus, 1 of 2
Fuse Block - Underhood IGNITION 1, IGNITION 2 Fuses, Ignition Switch (MR-140)
Fuse Block - Underhood HEADLAMP, POWER WINDOW, REAR DEFOGGER Fuses
G102, G101, G106
Figure 2:

Compressor Controls (Sirius D4)
Object Number: 1376187 Size: FS
Master Electrical Component List
Compressor Controls (MR-140)
Blower Controls
Fuse Block - Underhood B+ Bus, 1 of 2
Fuse Block - I/P RELAY IGN Fuse
Fuse Block - Underhood B+ Bus, 1 of 2
Engine Data Sensors - Pressure and Temperature
Engine Data Sensors - Oxygen Sensors
G102, G101, G106
Figure 3:

Compressor Controls (MR-140)
Object Number: 1478514 Size: FS
Master Electrical Component List
Compressor Controls (ITMS-6F)
Compressor Controls (Sirius D4)
Fuse Block - Underhood B+ Bus, 1 of 2
Fuse Block - I/P RELAY IGN Fuse
Fuse Block - Underhood B+ Bus, 1 of 2
Engine Data Sensors - Pressure and Temperature
Fuse Block - I/P ELECTRICAL MIRROR, HEATER Fuses
G102, G101, G106
Figure 4:

Compressor Controls (ITMS-6F)
Object Number: 1478515 Size: FS
Master Electrical Component List
Temperature Controls/Air Delivery
Compressor Controls (MR-140)
Fuse Block - Underhood B+ Bus, 1 of 2
Fuse Block - I/P RELAY IGN Fuse
Fuse Block - Underhood B+ Bus, 1 of 2
Engine Data Sensors
Engine Data Sensors
Engine Data Sensors
Engine Data Sensors
Engine Data Sensors
Engine Data Sensors
G102, G101, G106
Figure 5:

Temperature Controls/Air Delivery
Object Number: 1503283 Size: FS
Master Electrical Component List
Compressor Controls (ITMS-6F)
Fuse Block - Underhood IGNITION 1, IGNITION 2 Fuses, Ignition Switch (MR-140)
IP Illumination (w/ Dimming (RHD))
G203
G203