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Home › Chevrolet › 2014 › Express 1500 LS, AWD › Repair and Diagnosis › Engine Performance › System › Data Communication System › Diagnostic Information and Procedures › DTC U0073 or U2100: Control Module Communication Bus/Controller Area Network (CAN) Bus/ECU HS-LS Bus › Circuit/System Verification

Circuit/System Verification

  1. Refer to Data Link References  to determine which serial data system is used for a specific control module.
  2. This DTC cannot be retrieved with a current status. Diagnosis is accomplished using the symptom Scan Tool Does Not Communicate with High Speed GMLAN Device  or Scan Tool Does Not Communicate with Low Speed GMLAN Device .
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