Vehicle Speed Sensor Buffer
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1997 GMC Savana Special, 1997 GMC Savana Camper Special, 1997 GMC Savana, 1997 Chevrolet RV Cutaway, and 1997 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle speed sensor buffer receives and converts AC voltage to a rate of 4000 pulses per mile. This signal is then sent to cruise control module, speedometer, and VCM/PCM. These components convert number of pulses per mile to pulses per second to determine speed of vehicle. Buffer is located on left side of instrument panel, near parking brake.