THIS YUKON XL HAS A 14 IN LONGER WHEELBASE THAN THE YUKON AND ABOUT 20 IN LONGER OVERALL. THE XL CAN HAUL A LOT OF PEOPLE AND CARGO AT THE SAME TIME. 2001 YUKONS HAVE A TIGHTER TURNING RADIUS FAR BETTER IN CROWDED PARKING LOTS . THE YUKON REDESIGNED BRAKES ARE 40 PERCENT LARGER VENTILATED DISC ON FRONT. AND 13.2 IN ON REAR