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U2100 72 Cadillac STS I

Communication Devices
  1. This DTC cannot be retrieved with a current status. Diagnosis of a current DTC is accomplished via the symptom, Scan Tool Does Not Communicate with High Speed GMLAN Device. Refer to «Scan Tool Does Not Communicate with High Speed GMLAN Device»(ref-197535-S13200116172005101200000) .
  2. An intermittent condition is likely to be caused by a short on the high speed high speed GMLAN serial data circuits. Use the Scan Tool Does Not Communicate with High Speed GMLAN Device procedure in order to isolate an intermittent condition. Refer to «Scan Tool Does Not Communicate with High Speed GMLAN Device»(ref-197535-S13200116172005101200000) .

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