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Tahoe / Yukon Service Manual

Symptoms - Driver Assistance Systems

  1. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true: before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
  2. Review the system operation in order to familiarize yourself with the system functions: Active Safety System Description and Operation Adaptive Cruise Control Description and Operation Forward Collision Alert Description and Operation Lane Keep Assist Description and Operation Safety Alert Seat Description and Operation Side Blind Zone Alert Description and Operation Visual/Physical Inspection Inspect for aftermarket devices which may affect the operation of the system. Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom. Make sure the parking assist sensors located on the vehicle front and rear bumper are clear. Remove any snow, mud or ice that is blocking the sensors. Intermittent Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections. Symptom List Adaptive Cruise Control Malfunction Safety Alert Seat Malfunction Forward Collision Alert System Malfunction Side Blind Zone Alert System Malfunction Lane Keep Assist System Malfunction