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Home >> GMC >> 2014 >> Sierra 2500 HD SLT, 6.6L Eng VIN 8, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U0073 or U2100: Control Module Communication Bus/ECU Bus/CAN 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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