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Home >> Chevrolet >> 2013 >> Suburban K2500 >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U1815 >> Circuit/System Verification
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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).
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