GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Hydraulic Brake Schematics
Figure 1:

Hydraulic Brakes
Object Number: 2076200 Size: FS
Figure 2:

Power Brake Booster Pump Controls and Stop Lamp Switch
Object Number: 2076201 Size: FS