K 2500 Truck 4WD V8-6.5L DSL Turbo VIN S (1998)
Vehicle Speed Sensor Signal Buffer: Description and Operation
DESCRIPTION
The Vehicle Speed Sensor (VSS) buffer module is an electronic device. The VSS buffer module process inputs from the vehicle speed sensor and
outputs various signals. The VSS buffer module outputs a 4000 pulse per mile signal. This signal is used by the PCM in order to determine the vehicle
speed. The PCM uses the vehicle speed signal input for cruise control and fuel cutoff. The VSS buffer module is matched to the vehicle based on the
transmission, the final drive ratio and the tire size. The VSS buffer module is located behind the instrument panel.
