2023 GMC Sierra HD: The GMC Sierra HD remains unchanged for 2023. Sierra HD is a heavy-duty truck that seats 5 passengers. Competitors include the Ford F-250 and F-350, Silverado 2500 and 3500, and Ram 2500 and 3500.

There are five trims available: Sierra HD Pro, SLE, SLT, AT4, and Denali. Two engines are offered: A 6.6-liter V8 that makes 401 horsepower and pairs to a 6-speed automatic transmission, and a 6.6-liter Duramax turbo diesel engine that makes 445 horsepower and pairs to a 10-speed automatic. Rear-wheel drive is standard with four-wheel drive being optional. Maximum towing capacity is 35,500 pounds. Pricing ranges from $43,000 to $75,000.
 

Visit the official GMC site for more information