With a max tow rating of 35,500 lbs., the 2020 Sierra 2500/3500 diesel provides 52% more towing capability than its previous model year.
2020 GMC Sierra HD Unveiling
The 2020 GMC Sierra HD goes on sale later this year in 2500HD and 3500HD dual rear wheel and single rear wheel configurations. The trucks, when properly equipped, can tow in excess of 30,000 pounds.