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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 167 (Engine Controls And Fuel - 3.6L (LGX LF4) - DTC P0650 To DTC P3436 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2635: Fuel Pump Flow Performance (LF4) >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Do not replace the K111 Fuel Pump Driver Control Module based on a history DTC P2635. DTC P2635 may be stored but that does not indicate a failure of the K111 Fuel Pump Driver Control Module. Refer to Strategy Based Diagnosis for further history DTC diagnostics.

  1. Verify the proper fuel system pressure. Refer to Fuel System Diagnosis (LF4) .
    • If the fuel pressure is not normal 

      Repair the fuel system as necessary.

    • If the fuel pressure is normal 
  2. All OK.
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