Operation CHARM
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GMC Truck
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1997
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Safari Van AWD V6-4.3L VIN W
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Repair and Diagnosis
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Instrument Panel, Gauges and Warning Indicators
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Testing and Inspection
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Component Tests and General Diagnostics
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Circuit Operation - Gauges and Warning Indicators
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Speedometer/Odometer
Speedometer/Odometer
The Vehicle Speed Sensor produces voltage pulses of frequency proportional to vehicle speed. This signal is processed by the Vehicle Control Module to produce a voltage pulse signal to the speedometer and
odometer
.