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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 508 (Engine Controls/Fuel - 5.3L, 6.0L, 6.2L - DTC P0420 To DTC P3449 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Inspection/Maintenance System Check >> Circuit/System Verification

Circuit/System Verification

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Review the I/M System Status indicators. All I/M System Status indicators should report YES, and no I/M Test DTCs should be present.

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