Matt Flynn

The app is called Vibsensor, is on my iPhone and can be downloaded from the App Store ($5 for full version). It records all sorts of data for one minute at a time. The data I posted was taken at 70 mph on the same stretch of road before and after tires.

Here is my before/after vibration test. Before was how the truck came from the dealer, after is with the new tires.

I have a 2wd '15 Yukon, and since the dealer put new tires on my factory 20" wheels, my issues have disappeared. I want to put 24" wheels on it this weekend, however i'm a bit hesitant until i'm confident the truck wont develop vibrations/buffeting. I only have 300 miles on the truck right now...If the truck was going to exhibit the vibration/buffeting issues, would they be present now, or is there a chance they'll still develop?

I bought the truck new, and have only had it a few hundred miles, however I've never experienced any vibration or buffeting at lower speeds. All of my issues occurred between 65-80mph. It was a mixture of vibration with buffeting/booming, but I didn't notice a pressure sensation. The dealer mentioned that my front right tire was in bad shape though, and came in at 65lbs on the road force balance. I'm hoping everything remains ok from here on out.

4 new tires ended up resolving my vibration and buffeting at highway speed.

I go in to pickup my Yukon tomorrow, and supposedly they've fixed the vibration I've been experiencing between 70-80mph. They said the initial Road Force balance came in at 25lbs on all wheels, except the front right (which was nearly 70lbs). The dealer has replaced all tires...fingers crossed

Thanks for the advice. What vehicle did you end up with after the Denali?

I think the article is a great way of bringing light to this situation, and I commend you for helping make this more public. It may also end up helping me with the issues i'm experiencing now as well. I wish i would've found this forum/thread prior to purchasing my '15 Yukon last week, however i didn't even give a second thought to a high dollar SUV having such widespread problems. I also didn't get the vehicle over 70mph during the test drive, so everything seemed good at time of purchase. I have no other complaints at this time, and the ride has been great up until I hit 70mph. From there on up i get all the wonderful vibrations and buffeting, however mine seems somewhat cyclical. My Yukon also came with the factory 20" wheels. With only 200 miles on her, i dropped it back off at the dealer this morning for the road force balance. If this doesn't correct the issue, i'll certainly be pushing for either a buyback or exchange (although i'm hesitant to even entertain an exchange). Allowing the dealer to go on a wild goose chase, swapping out major components on a brand new vehicle will not fly with me. Fingers crossed that the road force balance solves my problem.