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Tahoe / Yukon Service Manual

Symptoms - Displays and Gauges

  1. Before using the symptom diagnostic tables, perform the Diagnostic System Check - Vehicle in order to determine that there are no DTCs set, and that the control modules can communicate via the serial data link.
  2. Review the system operation in order to understand the system functions. Refer to the following description and operations: Instrument Cluster Description and Operation Indicator/Warning Message Description and Operation Audible Warnings Description and Operation Head-Up Display Description and Operation Visual/Physical Inspection Inspect for aftermarket devices which can affect the operation of the instrument panel cluster or the audible warning systems. Inspect the accessible system components or the visible system components for obvious damage or for obvious conditions which can cause the symptom. Inspect for the proper fluid levels. Intermittent Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections Symptom List Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: Fuel Gauge Malfunction Engine Oil Pressure Gauge Inaccurate or Inoperative Head-Up Display Malfunction Outside Air Temperature Display Malfunction