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I have a 2019 LTZ with a 5.3 liter engine and while driving over 45-50 mph, I hear a noise that sounds like someone blowing over the edge of a soda bottle. It’s not super loud but is very annoying. The sound is there regardless of speed of the fan or settings on the climate control panel. I’ve also checked for it with the radio off, it’s still there. I have 11k on it now.

Ive read on the forum, that some have had something like the same sound and it was fixed by changing the fuel tank vent hose.


I would appreciate any ideas as to what could be the cause. I really like the truck except for the noise.

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