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

Brake Fluid Level Switch


Object Number: 1488426  Size: LF
(1)Brake Booster
(2)Brake Fluid Level Switch
Figure 2:

Pedal Switches and Sensors


Object Number: 1488592  Size: LF
(1)Park Brake Switch
(2)Brake Pedal Position Sensor
(3)Accelerator Pedal Position (APP) Sensor
(4)Left Front Floor Panel