2001 marked the introduction of a more powerful V8 to the Yukon XL and the Denali trim. The full-size SUV has 5.3 L and 6.0 L V8 powertrains. In addition, you can choose from 9 different trims. Later models have 13 trims due to the introduction of basic 1500 and 2500 4WD and RWD trims. Gas mileage comes out to around 14 mpg in the city and 18 on the highway. The '01 Yukon XL has 4 doors and seats 8-9 passengers, depending on which trim you choose. Max cargo capacity comes out to 132 cubic feet while max towing capacity generally ranges from 8000 to 9000 lbs., with some trims towing up to 12000 lbs. Overall, the 2001 incarnation of the Yukon XL gets high marks for its engines and interior room. While this domestic SUV could use some stylistic refinement, the addition of the Denali makes the Yukon XL an even better buy. Pick up the 2001 model if you need something more affordable with reasonably modern features.