GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Air Delivery System


Object Number: 586847  Size: FS
HVAC Components
Vacuum Routing
Power Distribution Schematics
Ground Distribution Schematics
Ground Distribution Schematics
Ground Distribution Schematics
Temperature Control Motor Circuit Description
Figure 2:

Vacuum Routing


Object Number: 586859  Size: FS
HVAC Components
Operating Modes
Air Delivery System