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Cadillac
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1999
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Seville STS V8-4.6L VIN 9
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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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Current Octane Level
Current Octane Level
The display shows 87 to 93. This display indicates the spark advance octane table that the engine is operating in.