GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Hydraulic Brake Schematics
Figure 1:

Brake Controls, Park Brake Switch
Object Number: 1908573 Size: FS
Master Electrical Component List
Brake Warning System Description and Operation
Control Module References
Power Brake Booster Pump Controls and Stop Lamp Switch
G101 - 1 of 2
Instrument Panel Cluster - 1 of 2
AIRBAG, GAGES, LT REAR TURN/STOP, and RT REAR TURN/STOP Fuses/Circuit Breakers
AIRBAG, GAGES, LT REAR TURN/STOP, and RT REAR TURN/STOP Fuses/Circuit Breakers
Splice Pack SP203
G203 - 2 of 4
DIC
Figure 2:

Brake Booster Controls and Stop Lamp Switch
Object Number: 1908576 Size: FS
Master Electrical Component List
Hydraulic Brake System Description and Operation
Control Module References
Hydraulic Brakes
BAT/HAZ, HAZRD, PWR/ACCY, STOP, and TRLR Fuses/Circuit Breakers
Hazard, Stop, and Turn Signal Controls
G103 - 2 of 2