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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.
NOTE:

An invalid data DTC is normally set along with another DTC or symptom. Diagnose other DTCs and/or symptoms before replacing any device.

  1. Engine running for 10 s.
  2. Ignition ON, engine OFF, verify DTC U2500-U25FF is not set.
    • If DTC U2500-U25FF is set without other DTCs set 
    1. Program the device specified by the DTC descriptor.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the appropriate device.
      • If the DTC does not set
    3. All OK.
    • If DTC U2500-U25FF is not set 
  3. All OK
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