GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Buick
🢒
2005
🢒
LaCrosse
🢒
Vehicle Control Systems
🢒
Vehicle DTC Information
🢒 HVAC Schematics
Figure
1:
Power, Ground, and Blower Controls
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Compressor Controls and Serial Data (L26)
Fuse Block - Underhood BATT MAIN 1 Fuse, Fuse Block - I/P PK LAMPS, DISPLAYS, CHMSL/BKUP, INT LIGHT, RFA/MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, and CANISTER Fuses and PK LP Relay
Fuse Block - Underhood ABS, TRANS SOL, PCM, SIR, and DISPLAY Fuses, CRANK Relay, and Fuse Block - I/P CRUISE SW Fuse
Fuse Block - Underhood B+ Bus
I/P, Console, and Driver Door Lighting
G202
G200
Figure
2:
Compressor Controls and Serial Data (L26)
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Compressor Controls and Serial Data (LY7)
Power, Ground, and Blower Controls
Fuse Block - Underhood B+ Bus
L26
G115 (L26)
Figure
3:
Compressor Controls and Serial Data (LY7)
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Air Temperature and Sunload Sensors
Compressor Controls and Serial Data (L26)
Fuse Block - Underhood B+ Bus
LY7
5 Volt and Low Reference, Page 1 of 2
5 Volt and Low Reference, Page 1 of 2
G115 (LY7)
Figure
4:
Air Temperature and Sunload Sensors
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Air Delivery/Temperature Controls
Compressor Controls and Serial Data (LY7)
Headlights/Daytime Running Lights (DRL) Schematics
Fuse Block - Underhood ABS, TRANS SOL, PCM, SIR, and DISPLAY Fuses, CRANK Relay, and Fuse Block - I/P CRUISE SW Fuse
G202
Figure
5:
Air Delivery/Temperature Controls
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Air Temperature and Sunload Sensors