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Hummer
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2008
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H2 4D Utility Wagon
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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 And Fuel - 6.2L - DTC P0300 To DTC P1175
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DTC P0506 or P0507
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Conditions for Setting the DTC
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P0506
Conditions for Setting the DTC: P0506
The actual idle speed is approximately 100 RPM lower than the desired idle speed.