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HOMESERVICE MANUALSCHEVROLET2013SILVERADO 2500 HD LT, 2D CAB CHASSIS, 6.6L ENG VIN 8, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2575 (DATA COMMUNICATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC U0100 - U02FF: CONTROL MODULE U CODE LISTCIRCUIT/SYSTEM VERIFICATION
2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWD

Circuit/System Verification

2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWDSECTION Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Sierra 3500 HD, 2015 GMC Sierra 2500 HD, 2015 GMC Sierra 1500, 2015 Chevrolet Silverado 3500 HD, and 2015 Chevrolet Silverado 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Determine the device that is not communicating. Refer to Control Module U Code List .
  2. Verify that DTC U0073, U2100, U0074, U0078, U1814, U2099, B1325, B1330, B1370, B1380, B1424, B1440, B1441, B1517, C0800, C0899, C12E1, P0560, or P0562 is not set.
    • If none of the DTCs are set 
  3. Verify that DTC U0125 and DTC U0126 are not set together.
    • If both of the DTCs are not set together 
  4. Engine running for 10 s.
  5. Ignition ON, engine OFF, verify that DTC U0100-U02FF is not set.
    • If the DTC U0100-U02FF is set in any device, except the K17 Electronic Brake Control Module 

      Refer to Circuit/System Testing.

    • If the DTC U0100-U02FF is set in the K17 Electronic Brake Control Module with any symptom byte, except symptom bytes 71, 72, and 74 

      Refer to Circuit/System Testing.

    • If the DTC U0100-U02FF is set in the K17 Electronic Brake Control Module with symptom byte 71, 72, or 74 along with other DTCs set 

      Diagnose all other DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

    • If the DTC U0100-U02FF is set in the K17 Electronic Brake Control Module with symptom byte 71, 72, or 74 and without other DTCs set 
    1. Program the K17 Electronic Brake Control Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the K17 Electronic Brake Control Module.
      • If the DTC does not set
    3. All OK.
    • If the DTC U0100-U02FF is not set 
  6. All OK.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.