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Home >> GMC >> 2013 >> Yukon Base, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U1815 >> Circuit/System Verification

Circuit/System Verification

  1. Verify that DTC B137A is not current in the serial data gateway module (SDGM).
  2. Verify that DTC U1815 is not set current only in the HPCM.
    • If the DTC is current in the HPCM only, replace the drive motor power inverter module (PIM).