GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Buick
🢒
2004
🢒
Park Avenue
🢒
Body
🢒
Body Control System
🢒 HVAC Schematics
Figure
1:
Blower Control
Master Electrical Component List
Air Delivery Description and Operation
Power and Ground
G201 (1 of 2)
Figure
2:
Power and Ground
Master Electrical Component List
Air Delivery Description and Operation
Compressor Control
Blower Control
eft Underhood Fuse Block- BAT 1 Fuse/ Rear Fuse BLock-RDM, C/LTR, DDM, HTDST L, TRK REL Fuses/ I/P Fuse Block- PDM, SBM, and CSTR/SBM Fuses
I/P Fuse Block- HVAC and A/C Fuses
I/P and Front Door Backlighting
Class 2 Serial Data Line
G202 (2 of 4)
G202 (1 of 4)
Figure
3:
Compressor Control
Master Electrical Component List
Air Delivery Description and Operation
Actuators
Power and Ground
Left Underhood Fuse Block- T/SIG, A/C CLU Fuses and A/C CLU Relay
Class 2 Serial Data Line
5 Volt and Low Reference
G100, G101, G102 and G103
Figure
4:
Actuators
Master Electrical Component List
Air Delivery Description and Operation
Sensors
Compressor Control
Left Underhood Fuse Block- IGN Fuse/ I/P Fuse Block-RUN Fuse, IGN 3 and ACCY Relay
Figure
5:
Sensors
Master Electrical Component List
Air Temperature Description and Operation
Steering Wheel and Temperature Controls
Actuators
Figure
6:
Steering Wheel Controls
Master Electrical Component List
Air Temperature Description and Operation
Sensors
Circuit Breaker/Rear Fuse Block- RDO/PH, SUNRF Fuses and RAP Relay
Circuit Breaker/Rear Fuse Block- RDO/PH, SUNRF Fuses and RAP Relay
Power, Ground, and Serial Data
VIU Output Signals
SIR Caution for Zoning
SIR Caution for Zoning