GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 HVAC 🢒 HVAC - Automatic 🢒 HVAC Schematics
Figure 1:

Power, Ground, Blower Motor Controls
Object Number: 2081089 Size: FS
Figure 2:

Mode and Air Temperature Controls
Object Number: 2081104 Size: FS
Figure 3:

Compressor Controls
Object Number: 2081134 Size: FS
Figure 4:

Air Temperature Controls
Object Number: 2081142 Size: FS