If you want a Tahoe that'll outlive your mortgage, hunt down a 2000-2006 GMT800, the last generation before GM added Active Fuel Management and turned oil consumption into a lifestyle. Those trucks routinely hit 250k miles with just a transmission rebuild somewhere past 150k. Everything from 2007 forward carries the AFM lifter time bomb: one collapsed lifter means a $5,000 engine teardown, and the 6L80/8L90 transmissions fail even when you do everything right. The 2021 redesign rides better and looks sharper, but dealership techs report transmission replacements at 1,400 miles, and GM's killing CarPlay in 2026, locking you into their buggy infotainment forever. Buy a GMT800 if you want peace of mind, or budget for an AFM delete the day you sign. Skip this if you want a full-size SUV that doesn't require a maintenance prayer circle.
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.