This full-size SUV splits into two distinct stories. The first-generation trucks with the 4.6L V8 were unkillable, owners routinely hit 400k-500k miles with nothing but oil changes, but rust ate the bodies and air suspension failures totaled otherwise healthy trucks. The current generation (2018-2024) offers serious space, strong towing, and genuine family comfort, but the 10R80 transmission is a documented weak point: multiple owners report rebuilds or replacements before 100k miles at $7k-10k out of pocket. If you're buying used in the 60k-100k mile range, budget for transmission work or get an extended warranty that covers it. The 2025-2026 redesign brings a polarizing oblong steering wheel and touch-heavy controls that owners either adapt to or never stop resenting. Buy this if you need the space and towing capacity, can afford the warranty, and don't mind that it drives more like a truck than a luxury cruiser. Walk if you're stretching the budget or buying high-mileage without coverage.
Three rows, serious towing capacity, and enough space to swallow a hockey team's gear, the Yukon XL handles the big-family hauling job when it's running. But the 6.2L V8 in recent models has a rod bearing problem: engines seizing under 40k miles, sometimes at highway speed, with replacement waits stretching into months while you're handed the keys to an Equinox. The 3.0L diesel avoids most of this drama, delivers 27 mpg highway, and pulls strong. If you're buying new, skip the V8 and load up on warranty. If you're shopping used, the 2000-2014 trucks earned their reputation for going 200k-plus; the current generation is a different story. Buy the diesel or buy something else.