2015 gmc sierra brand new

taylork · July 9, 2015

I purchased a new 3500 gmc. Drove from NY to Myrtle Beach. Once here with constant traveling I am hearing a non-stop whistling when I drive and get up to a speed above 30. It gets louder from stop to upper speeds. Checked air conditioning, windows, etc. Extremely loud and appears to come from the center console or windshield. Called Myrtle Beach GMC and they basically said I was nuts that they never heard of such a thing. I found a you tube video on the internet that is the exact same problem or noise that I have in this brand new $50,000 crew cab truck. It's not my imagination. Any suggestions would be truly and greatly appreciated. The whistling is so loud you cant talk in the cab.

newdude · July 9, 2015

Any window or hood deflectors on the truck?

taylork · July 9, 2015

no deflectors at all clean truck thanks Brian

Matt · July 10, 2015

I purchased a new 3500 gmc. Drove from NY to Myrtle Beach. Once here with constant traveling I am hearing a non-stop whistling when I drive and get up to a speed above 30. It gets louder from stop to upper speeds. Checked air conditioning, windows, etc. Extremely loud and appears to come from the center console or windshield. Called Myrtle Beach GMC and they basically said I was nuts that they never heard of such a thing. I found a you tube video on the internet that is the exact same problem or noise that I have in this brand new $50,000 crew cab truck. It's not my imagination. Any suggestions would be truly and greatly appreciated. The whistling is so loud you cant talk in the cab.

See if there is any helpfull info in here

http://www.gm-trucks.com/forums/topic/163837-whistling-noise/