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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 P1255 To DTC P2635
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DTC P1380 or P1381
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Repair Instructions
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.