Warning:Refer toAssistant Driving Warning.
Interior windnoise is not heard when the window is lowered.Interior windnoise is caused by the air leaving the inside of thevehicle through a seal or a seam.
Tape over the relief valves to cause added air pressurewithin the vehicle.Test drive the vehicle and listen for windnoise or awhistle.Pull the vehicle over and make the temporary repairs usingmasking tape. If you cannot determine the source of the windnoise,perform one or more of the following diagnostic tests:Air Pressure TestSoap Suds or Bubble TestTracing Powder or Chalk Test#PIT5236: Diagnostic Tip: OnStar Module Does Not Support All B101D Symptom Codes - (Oct 3, 2013)
Subject:Diagnostic Tip: OnStar Module Does Not Support All B101D Symptom CodesModels: 2011 - 2014 All GM Passenger Car and Light Duty Trucks with RPO UE1(Except 2011-2013 Chevrolet Corvette, 2011-2012 Chevrolet Colorado, 2011-2012 GMCCanyon)The following diagnosis might be helpful if the vehicle ex ...