GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Buick
🢒
2004
🢒
Century
🢒
HVAC
🢒
HVAC Systems - Manual
🢒 HVAC Schematics
Figure
1:
Blower Controls
Master Electrical Component List
Air Delivery Description and Operation
Compressor Controls
Fuse Block - I/P LOW BLWER, CRUISE, HVAC Fuses
Fuse Block - Underhood IGN 2 Fuse
Fuse Block - Underhood BAT 1 Fuse, Fuse Block - I/P RADIO, HVAC, RFA, CLSTR, ALDL, BCM PWR, ACCY POWER BUS, RADIO PREM. SOUND, and LTR Fuses
Fuse Block - Underhood BAT 2 Fuse, Fuse Block - I/P HI/BLWR, HAZRD, STOP LAMPS, DR/LCK, and PWR/MIR Fuses
Fuse Block - Underhood BAT 1 Fuse, Fuse Block - I/P RADIO, HVAC, RFA, CLSTR, ALDL, BCM PWR, ACCY POWER BUS, RADIO PREM. SOUND, and LTR Fuses
G200, Page 1 of 2
Figure
2:
Compressor Controls
Master Electrical Component List
Air Temperature Description and Operation
Temperature Actuators
Blower Controls
Fuse Block - I/P TRN/SIG, AIR BAG, CLSTR, and PCM, BCM U/H Fuses, Fuse Block - Underhood CRANK and IGN MAIN Relays
Fuse Block - I/P TRN/SIG, AIR BAG, CLSTR, and PCM, BCM U/H Fuses, Fuse Block - Underhood CRANK and IGN MAIN Relays
G100, G113, and G171
G100, G113, and G171
Fuse Block - Underhood B+ Bus
G100, G113, and G171
EVAP Controls and FTP Sensor
Fuel Controls - EVAP and FTP
G100, G113, and G171
Figure
3:
Temperature Actuators
Master Electrical Component List
Air Temperature Description and Operation
Compressor Controls
Fuse Block - I/P LOW BLWER, CRUISE, HVAC Fuses
Fuse Block - I/P LOW BLWER, CRUISE, HVAC Fuses
G200, Page 1 of 2