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Home › Chevrolet › 2009 › Uplander Base, 3.9 1 › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 3.9L - DTC P0341 To DTC P2544 › DTC P2544 › Circuit/System Testing

Circuit/System Testing

Observe the DTCs with the scan tool.

If DTC P0604 is set, replace the ECM.
If DTC P0604 is not set, replace the TCM.