Circuit Description
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1997 GMC Yukon, 1997 GMC Suburban, 1997 GMC Pickup, 1997 GMC Cab & Chassis, and 1997 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle Speed Sensor (VSS) circuit is a magnetic induction type sensor. Gear teeth pressed on outside diameter of output shaft assembly induce an alternating current in sensor as shaft rotates. Signal goes directly to VCM. Pulsing action takes place about 40 times per revolution of output shaft of transmission and VCM will calculate vehicle speed based on time between pulses.