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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 P2120, P2122, P2123, P2125, P2127, P2128, or P2138
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Conditions for Clearing the MIL/DTC
Conditions for Clearing the MIL/DTC
DTCs P2120, P2122, P2123, P2125, P2127, P2128, and P2138 are Type A DTCs.