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Chevrolet
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2003
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Impala LS
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System Self-Diagnostics - 3.8L
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System Tests
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Mil Always On
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Test Description
Test Description
The numbers below refer to the step numbers in the diagnostic procedures.
2
The step determines if the condition is with the MIL control circuit or the PCM.