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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Data Communications >> Diagnostic Information and Procedures >> DTC U0073 or U2100 >> Circuit/System Verification

Circuit/System Verification

  1. Refer to Data Link References  to determine which serial data system is used for a specific 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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