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Tahoe / Yukon Service Manual

Soap Suds or Bubble Test

  1. Close all the windows.
  2. Turn the vehicles ventilation fan to the on position, with the selector on high speed and in the defrost mode (or panel mode with fresh air vent on – no recirc).
  3. Unlock and close the doors.
  4. Apply the soap solution to the potential leak areas.
  5. Look for bubbles revealing escaping air.
  6. If unsuccessful in identifying the leak path, consider masking off the pressure relief valves (to increase cabin pressure) and perform the evaluation again.