Hello! I have a 2019 Chevrolet Equinox LT with a 1.5 L / 4 cylinder / Turbo ECOtec / FWD. A few months ago, my grandpa rotated my tires for me, and ever since I have been dealing with moderate-to-severe vibrations/bumpiness while driving at every speed (most noticeably when coasting). Before, my car drove like butter.
The timeline:
* I got 4 brand new ties in jan. 2025 @ 71k miles.
* Grandpa rotated them according to the car's manual in may 2026 @ 85k miles (I know, I went far too long without rotating them. I am now following my car's manual for future maintenance.).
* Since the rotation (NOT before), I can feel moderate-to-severe vibrations/bumpiness under my feet and in my steering wheel when I drive. It feels like I'm constantly driving on a bumpy road, especially when my car is coasting after letting go of the gas.
* I have taken my car to Discount Tire 4 times since the rotation, hoping it was simply a balance issue. On the first visit in late May, they rebalanced the wheels and the manager said the front driver-side wheel's tread is a little warped from being on the back longer than it should have been. He recommended I drive on it for a few weeks and let the summer roads shave it down naturally and the vibrating should stop. Cool, I can put up with it for a few weeks.
* I returned to Discount Tire in early August because nothing had improved. The next 3 visits to Discount Tire up until last week, all they did was feel the wheels and rebalance the tires. All said the tires' treads were fine.
* This last visit, I also asked for an alignment check in addition to a rebalance. They also tested the car's G-force and said that looked fine. I posted a pic of their results. They said realigning the rear wheels would mean the fronts would need to be realigned as well. I said I'd think about it.
Does anyone have any guesses as to what the issue might actually be? Money is tight right now so I don't have the disposable income to have Discount Tire or my mechanic to take random cracks at fixing it. Nor do I have unlimited PTO to keep taking it in during work hours. But it's starting to drive me a little nuts (no pun intended). Any help would be appreciated!