Quick Summary
The Yukon offers three engines, a 5.3L V8, an available 6.2L V8, and a 3.0L Duramax turbo-diesel delivering 495 pound-feet at 1,500 RPM, while the Expedition runs one 3.5L twin-turbo V6 rated at 400 horsepower, or 440 in High-Output form. Maximum towing favors the Expedition at 9,600 pounds against 8,400, though most trailers pulled by either SUV land between 4,000 and 7,000 pounds. Cargo space runs the other direction, with 25.5 cubic feet behind the Yukon's third row against 21.6, and 122.8 cubic feet maximum…