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GMC Truck
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1999
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Savana 1/2 Ton Van V8-305 5.0L VIN M 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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CMP Retard
CMP Retard
Range (0-90 Degrees)
The
CMP
Retard indicates a correction to the
CMP sensor
and the
CKP sensor
relationship caused by small tolerance variations or component misalignment.