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

Brake Warning System


Object Number: 1795650  Size: FS
Master Electrical Component List
Brake Warning System Description and Operation
Control Module References
Hill Hold Valve (HP7)
G301 1 of 2
Figure 2:

Hill Hold Valve (HP7)


Object Number: 1824236  Size: FS
Master Electrical Component List
Hydraulic Brake System Description and Operation
Control Module References
Brake Pressure and Vacuum Sensors (HP7)
Brake Warning System
Figure 3:

Brake Pressure and Vacuum Sensors (HP7)


Object Number: 1847606  Size: FS
Master Electrical Component List
Brake Assist System Description and Operation
Control Module References
Hill Hold Valve (HP7)