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Chevrolet
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2003
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Silverado 1500 HD, 4WD
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Repair and Diagnosis
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Engine Performance
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Testing & Diagnosis
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ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline
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Diagnostic Tests
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DTC P0506: Idle Control System - Low Rpm
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Test Description
Test Description
The number below refers to the step number in the diagnostic procedure.
2
This test determines if the engine can achieve the commanded RPM.