I have 500 miles on my 2020 Denali 3.0 Duramax 10 speed transmission, and love it! What a beautiful ride and truck! Traded a 19 Silverado RST with the 5.3, 8 speed ( junk transmission)! It had 11,900 miles whan traded and I hated the ride and side stepping over bumps! I also have a car fax...