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Home >> Chevrolet >> 2022 >> Express 2500 LS, 2.8L Eng VIN 1 >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications System >> Diagnostic Information and Procedures >> DTC U101A >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON/Vehicle In Service Mode.
  2. Verify DTC U101A is not set.
    • If the DTC is set 
    1. Program the K111 Fuel Pump Driver Control Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the K111 Fuel Pump Driver Control Module.
      • Go to next step: If the DTC does not set
    3. All OK.
    • Go to next step: If the DTC is not set 
  3. All OK
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