Section 95 (Instrument Panel - Analog): Operation: Gauges: Speedometer

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1999 Oldsmobile Bravada, 1999 GMC Sonoma, 1999 GMC Jimmy, 1999 GMC Envoy, and 1999 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle Speed Sensor (VSS) is as permanent magnet signal generator that produces analog output signal proportional to vehicle speed. This signal is processed by Vehicle Control Module/Powertrain Control Module (VCM/PCM) to produce a digital signal (4000 pulses per mile) that is sent to Instrument Panel Cluster (IPC) on designated circuit.

NOTE: Incorrect VSS calibration may adversely affect operation of ABS, engine control system and cruise control system.