Hi all - I have a 2018 Suburban Premier. Over the last month or so I have noticed a humming sound when driving, which changes pitch as the truck accelerates and decelerates. Any thoughts on what this can be? My initial thoughts are bearings, trans, differentials, u-joints. Seems like too soon for any of those parts to fail. Thanks!

 

If you put it in neutral and it goes away, does it still exist? If it goes quickly away letting off the gas, it is sometimes rear end or drivetrain. If you swerve left and right you change weight on each side. Sometimes as you do that the sound gets louder as you put the weight on one side with the swerve. That usually is a wheel bearing

 

How many miles on it? Front hubs are a common issue on every modern vehicle. My '11 front hubs didn't even make 100k miles. And a couple replacements didn't either.

 

No change when I put the truck in neutral. It does seem like the humming is slightly louder when going around a left hand curve. I have an appointment to have it checked by the dealer on Friday. Will say what they say. Thanks!

 

50k miles

 

If it is louder on a left curve, the issue is on the right side

 

It was the passenger side front bearing. Thanks!