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GMC Truck
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1999
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Safari Van 2WD V6-4.3L VIN W
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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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Reference Pulse Occurred
Reference Pulse Occurred
YES/NO
The scan tool will indicate a Yes after a
CKP sensor
reference pulse has been detected by the
VCM
.