Cutlass Supreme V6-3100 3.1L MFI VIN M (1994)
Brake Switch (Cruise Control): Description and Operation
Combination Vacuum Release Valve/Converter Clutch Switch
The vacuum release valve provides an additional vent to atmosphere for the servo unit when the brake pedal is held in the depressed position. The
venting is spring actuated and occurs within the free travel of the brake pedal arm.