Operation CHARM
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Buick
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1998
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Park Avenue Ultra V6-3.8L SC VIN 1
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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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Gauge Functions
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Engine RPM
Engine RPM
The engine RPM (
tachometer
) gauge is driven by a discrete input from the Powertrain Control Module
(PCM)
.