I leased a 2020 GMC Denali with the baby Duramax, crew cab 5/12 foot box and 4wd. Use the truck as passenger vehicle only and no towing. I am extremely pleased with that diesel. It is so smooth, quiet and powerful. Fuel economy has average about 27 mpg. Have only 3,000 miles so far. Small fuel tank but has a 600 mile range. Another extremely positive aspect is the 10 speed automatic. Don’t feel any shifting. I traded a 2019 Ford F-150 Lariat Super Crew with the 2.7 Ecoboost. Good little engine but 10 speed definitely not up to par with the GM. Steering definitely superior in the GM. One disappointment is the Lariat is in the middle of Fords lineup and it is more luxurious inside than the Denali that is top of the GMC lineup.