Hey folks, I will include an imgur link at the bottom for the video with sound since i cant figure out where to attach it. I've got a 2020 Suburban Premier with 100k miles thats making an awful roaring noise that sounds like mud tires. I replaced my tires with Michelin Defenders today and it made 0% difference in the sound.

It is so loud now that we actually have to speak up quite a bit just to talk in the car. I thought maybe its a wheel bearing but no amount of swerving or rocking the wheels while its jacked up gives me any indication of a bearing failure, but its quite possible. Im thinking either rear bearing or differential. But letting off the gas makes bo difference.

It sounds like its coming from everywhere inside the car but if I had to pick a corner, I would say right rear. Let me know what you think or if you've had this problem. Thanks!

https://imgur.com/a/ije4VbQ
Roaring sound

 

I would bet it's your rear end! Was this truck by chance used for towing?

 

I havent towed with it and single time since we have owned it which has been about a year. It was a fleet vehicle for a couple of years so im sure they weren't kind to it. How exactly can the rear end fail? Bearings?

Edit: this is my wife's daily and she drives like grandma. I won't say I don't lay into it when I drive but not all the time. The noise began when she took a trip to her sisters.(800 mile round trip)

 

The rear end differential can fail a few different ways. Low fluid level, neglect in maintenance and heavy towing and lastly corrosion.

 

Well it appears my left rear wheel seal has failed and im assuming has leaked the bearing dry. It sounds like the noise is on the right side though. Guess I'll do both just in case. Got a quote and its $650 just for one side. Guess I'll be renting the bearing puller/installer tools and doing it myself lol.

 

Good find! After you replace the seals, make sure the differential gear oil is drained and replaced.

 

Well im going to have to replace the bearing anyways so everything comes apart anyways. I wish it were the front, or none at all! Anyways thank you for you response!

 

Good luck on the repair! Let us know what you find after the repair.