2021 GMC Yukon XL AT4 Specs

The AT4 is only available with the old 5.3-liter V8, but it works much better with the new ten-speed transmission. The old six-speed did a poor job of using the available power, but the new ten-speed makes this old pig-iron V8 relevant. This model comes as standard with numerous features that enhance its off-road ability. First, it features magnetic ride control, which doesn’t just make it more comfortable around town, but also on dirt roads. The 4WD system even has low range for the tricky stuff and skid plates should you get it wrong. Oddly, the air suspension isn’t standard, though it increases the ride height by three to four inches, depending on the conditions.It comes with a heavy-duty air filter, hill descent control, red recovery hooks, and 20-inch all-terrain tires as standard. Inside there is an automatic heated steering wheel and heated outboard seats in the second row.