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Tahoe / Yukon Service Manual

Service Indicator Always On (1)

Service Indicator Always On Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions Circuit/System Description For an overview of the component/system, refer to: Transfer Case Description and Operation Reference Information Schematic Reference Transfer Case Control Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Circuit/System Verification

  1. Ignition » On / Vehicle » In Service Mode
  2. Verify there are no DTCs set related to the following component/system: K69 Transfer Case Control Module ⇒ If a related DTC is set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If a related DTC is not set
  3. Verify the scan tool can communicate with the following component: K69 Transfer Case Control Module ⇒ If the scan tool cannot communicate with the component Refer to: Symptoms - Data Communications ⇓ If the scan tool can communicate with the component
  4. Verify that no DTCs are set. ⇒ If any DTC is set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If no DTC is set
  5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification