GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Brakes 🢒 Air Brakes 🢒 Air Brake System Schematics
Figure 1:

Air Brake Warning System
Object Number: 2076195 Size: FS
Figure 2:

Air Brake System
Object Number: 2076196 Size: FS