The 2021 GMC Yukon XL AT4 4X4's towing capacity is rated at 3629 kg (8001 lbs) / 844 kg (1861 lbs). The Yukon XL AT4 4X4 wheels measure 20-inch in diameter. The size of the Spare Wheels is a ...

View all 2021 GMC Yukon XL specs. Starting msrp listed lowest to ... Also offered for the first time on the Yukon will be an off-road-oriented AT4 model. That aligns with GMC’s plans to offer ...

The GMC Yukon XL was completely redesigned on a larger chassis for 2021, gaining fresh styling ... and an off-road-oriented AT4 trim debuted. Engine options included a 5.3-liter V-8, 6.2-liter ...