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1985
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Chevette L4-111 1.8L DSL
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Repair and Diagnosis
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Transmission and Drivetrain
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Automatic Transmission/Transaxle
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Testing and Inspection
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Symptom Related Diagnostic Procedures
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High Oil Pressure
High Oil Pressure
1. Modulator vacuum line leaking.
2. Defective vacuum modulator.
3. Leak in vacuum system.
4. Defective pressure regulator valve.