Mike's Workshop Manuals
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Hummer
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2007
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H2 4D Utility Pickup
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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 - 6.0L - DTC P0141 To DTC P0454
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DTC P0171 or P0174
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DTC Descriptors
DTC Descriptors
This diagnostic procedure supports the following DTCs:
DTC P0171 Fuel Trim System Lean Bank 1
DTC P0174 Fuel Trim System Lean Bank 2