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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 P0973 To DTC P2764
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DTC P2723 or P2724
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Action Taken When the DTC Sets
Action Taken When the DTC Sets
DTCs P2723 and P2724 are Type A DTCs.
The TCM freezes transmission adaptive functions.
DTC P2723 defaults to Reverse, Park, Neutral, 5th, or 6th gear.
DTC P2724 defaults to Reverse, Park, Neutral, 1st, or 2nd gear.