GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Terraza 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 HVAC Schematics
Figure 1:

Front Blower Control, Ground, and Power
Object Number: 1636921 Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
Air Delivery and Temperature Control
CNSTR/VENT, CLSTR/HVAC, INT/LAMP, ONSTAR, and RADIO AMP Fuses
Control, I/P and Passenger Door Lamps
Data Link Connector (DLC) Schematics
B+ Bus
G102, G113 and G115
G102, G113 and G115
ABS, AIRBAG, CRUISE/SWTCH, HVAC/RPA/CRUISE, PCM IGN, and TRANS SOLS Fuses
Auxiliary Blower Controls - C69
G200 - 1 of 2
G200 - 2 of 2
G200 - 1 of 2
G200 - 1 of 2
Figure 2:

Air Delivery and Temperature Control
Object Number: 1636922 Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
A/C Compressor Controls
HVAC Schematics - Front Blower Control, Ground, and Power
Figure 3:

A/C Compressor Controls
Object Number: 1636923 Size: FS
Master Electrical Component List
Air Temperature Description and Operation
Control Module References
Auxiliary Blower Controls - C69
Air Delivery and Temperature Control
B+ Bus
ABS, AIRBAG, CRUISE/SWTCH, HVAC/RPA/CRUISE, PCM IGN, and TRANS SOLS Fuses
G102, G113 and G115
Data Link Connector (DLC) Schematics
G102, G113 and G115
G102, G113 and G115
Figure 4:

Auxiliary Blower Controls - C69
Object Number: 1636925 Size: FS
Master Electrical Component List
Air Delivery Description and Operation
Control Module References
A/C Compressor Controls
HVAC Schematics - Front Blower Control, Ground, and Power
Data Link Connector (DLC) Schematics
G401