Mike's Workshop Manuals
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Hummer
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2008
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H3 Base, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls And Fuel - 3.7L - DTC P0366 To DTC P2444
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DTC P0496
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Conditions for Setting the DTC
Conditions for Setting the DTC
The ECM detects vacuum during a non-purge condition.
The fuel tank vacuum is greater than 10 inches H2O for 5 seconds within 60 seconds of cold start.