Almost the perfect truck, GMC AT4 1500 baby Duramax tows 1200 lbs more for 2021. 2 in factory lift, 10 speed, inline 6 diesel, what else could you want. Only one problem. With the only exhaust brake diesel in the class, why can you not tell it works trailering down hill. MrTruck review, shows we really like this truck. All it would take is a different calibration of the 10-speed in tow haul mode and it would be king. GMC Sierra 2021 from General Motors. https://www.transwest.com/locations/f... #KentKelseyReview