A plush three-row that trades on deep discounts and a hushed cabin, but the 2018-2024 generation carries a documented transfer case weakness. Multiple owners report the same failure: the case splits catastrophically at highway speed, dumping fluid and stranding the vehicle, sometimes with only 30k-70k miles on the clock. When it works, you get adult-sized third-row space, a genuinely quiet ride, and dealer incentives that undercut Honda and Toyota by thousands. The catch is you're rolling dice on a known mechanical fault, and mismatched tires accelerate the failure. The all-new 2025 redesign swaps the V6 for a turbo four and starts fresh on a new platform, so the old gremlins shouldn't follow, but there's zero long-term proof yet. Buy used and you're gambling; buy new and you're hoping Buick learned its lesson.
The Yukon used to be the SUV you bought once and drove forever, GMT800s from 1999-2006 still cruise past 250k miles on original drivetrains, but the current 6.2L V8 has a bearing flaw that causes engines to seize without warning, sometimes at highway speed, often under 30k miles. GM recalled 2019-2024 models but 2025s are failing identically; one owner's engine died at 20k after the dealer promised the issue was resolved. If you need a new Yukon, the 3.0L Duramax diesel is the only powertrain worth trusting, though it's had scattered early turbo failures. Otherwise, find a GMT800 with records and accept 12 mpg, it's the last generation that actually delivers on the reputation.