2017 Yukon XL pulls to the right

[MJN]

Picked up a used 2017 Yukon XL this spring with just over 130,000 miles. Previous one owner, had damage to the left rear quarter panel that had been fixed but nothing reported to insurance/carfax/autocheck/etc. The tires were wearing uneven showing toe wear and would drift to the right while driving. I figured I would run those tires until fall since they still had plenty of tread and then get new tires and alignment. Early July I noticed the right front was worn severely and tires were needed asap. New tires and alignment were done but the truck still pulled to the right. I had a second shop check it, they aligned it and calibrated the steering sensor but still pulls to the right. Yesterday I had my local dealer check it, they did a four wheel alignment, checked front and rear suspension and all was found within spec. They swapped front tires side to side and rotated tires as well, then checked all brakes, calipers, slide pins, still pulls to the right. The dealer contacted GM tech service and disconnected power to the power steering and test drove, still pulls. Now they're saying it could be a balljoint or wheel bearing MIGHT be the problem. So I brought it home for the time being before throwing parts at it. I'm still thinking its chassis/frame related but I'm running out of ideas on this one and there aren't any frame/chassis shops close by. Other than the pull to the right it rides and drives fine, no bump steer or loose feeling, clunks or wanting to jump lanes when you hit a bump. I've followed behind while my wife drove it and it does not appear to be dog tracking either. Any other thoughts here on what I should check?