Scotty,
Recently put 4 michelin defender all season tires on the car at 46000 miles since then I've noticed a faint (almost out of round ) sound combined with a very rapid pulsating at 70 mph in the steering wheel to some folks it may be imperseptible but i feel it , took the vehicle back to where i purchased the tires and they rebalanced all 4 didn't help. then he ordered me 2 new tires for the front thinking it may have been a separated belt on one of the tires, still the same. Then went to my favorite alignment shop they took the time to also balance the front tires which he said were spot on... and drove it before and after the alignment said he heard and felt the same problem he put it up on the rack and tried to listen for a bad bearing with a stethoscope but said there wasn't a sound with the weight off the wheels he claims i'm going to have wait for it to worsen to find it and by the way all was done at no charge which was very stand up .... thoughts?
My wife has a 2013 GC with 160k miles. You will probably have to find an experienced suspension guy and pay him to replace suspension parts one at a time until it’s better.
HOWEVER...
Ours has the exact same problem from a bent wheel (my daughter was driving and slammed a curb at 45mph trying to avoid a squirrel 😠). Its not enough to be visible, and in fact Costco mounted 4 new tires on it without noticing. But enough to cause a vibration at highway speed if it’s in the front. I rotated the tires front to back and back to front, and the problem went away.
Try that.
I agree with @dad2pwd. I've also had a new tire installed on a very slightly bent front wheel with symptoms quite similar to yours. Swapping the bent one to the rear made the vibration imperceptible. It's definitely worth a try.
Thanks to both of you for responding already tried the front to rear thing and had all 4 rims checked its frustrating shouldn't be this difficult
Your welcome, sorry the simple fix didn't work out. The tire shop does sound good BTW. It sounds like they're trying to solve the problem.