Grand Prix V6-204 3.4L DOHC VIN X SFI (1995)
Vehicle Speed Sensor: Description and Operation
Vehicle Speed Sensor (VSS)
The Vehicle Speed Sensor (VSS) sends a pulsing voltage signal to the Powertrain Control Module (PCM) which the PCM converts to miles per hour.
This sensor mainly controls the operation of the Torque Converter Clutch (TCC).