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Home >> GMC >> 2001 >> Jimmy 2D Utility, RWD, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Analog Instrument Panels >> Operation >> Gauges >> Speedometer

Analog Instrument Panels: Operation: Gauges: Speedometer

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

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