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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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Transmission
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Automatic Trans
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Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0971
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DTC P0842 or P0843
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Circuit/System Verification
Circuit/System Verification
If there are any other transmission related DTCs set, diagnose those DTCs first.