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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 488 (Trailer Brake Control System) >> Diagnostic Information and Procedures >> DTC C0561 (Gasoline Without LY6) >> Circuit/System Verification

Circuit/System Verification

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  1. Verify that DTC U0100, U0121, U0140, or U2099 are not set.
  2. Verify that DTC C0035, C0040, C0045, C0050, OR C0131 are not set.
  3. Replace the fuel pump/trailer brake control module.
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