Shop diesel 2021 GMC Sierra 2500s for sale at Cars.com. Research, compare, and save listings, or contact sellers directly from 1 diesel 2021 Sierra 2500 nationwide.

More capable than the Sierra 1500 but less burly than the Sierra 3500HD with its available dual rear wheels, the 2026 GMC Sierra 2500HD offers impressive, work-ready capability along with appealing ...

The first of the GMC Sierra 2500 HD generations was introduced for 2001 as GMC’s line of heavier-duty trucks based on the Chevrolet Silverado 2500HD. They were positioned above the regular Sierra 1500 ...

Learn more about a vehicle you own or plan to buy to help avoid any hidden surprises. Check reported thefts and salvage records. Check previously reported mileage. 7 day trial allows you to run up to ...

Although diesel isn't a common fuel type in the United States these days, there are some who still buy diesel trucks because there are some advantages. For starters, new diesel trucks generally pull ...

If you like big trucks, or you tow a heavy load, I have one for you this week you'll love: The 2025 GMC Sierra 2500 Denali Ultimate, one of the biggest, baddest trucks GMC offers. It is an amazing ...

RealTruck.com reports on the latest truck accessories, featuring new products to enhance vehicle performance and style.