Operation CHARM
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Chevy Truck
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1999
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C 2500 Suburban 2WD V8-454 7.4L VIN J SFI
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Testing and Inspection
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Scan Tool Testing and Procedures
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Scan Tool Data, Normal Values and Definitions
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Scan Tool Data Definitions - Powertrain Systems
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Engine Speed
Engine Speed
Range (0-16,384 RPM):
The
VCM
computes the Engine Speed from the
CKP sensor
input.