Although only suitable for Silverado 1500 series models according to the menu, they definitely fit the Sierra 2500 HD 2500 Extended Cab with 40/20/40 seats in the center folding console. I called Rough Country and they even told me they don't fit in the Sierra 2500. Well there were few reviews that mentioned the 2500 and they said they fit them so I took a chance because I really wanted an RC brand. . I bought these for my Jeep and was very impressed with the quality and fit so I really wanted one for my truck. I had an older set from another brand that I paid almost a hundred dollars MORE for than the RC brand and there is no comparison. The RC brand beats them in quality, thickness and obviously price. I have no idea why even RC says they don't fit the Sierra 2500. They do it. The center console cover doesn't seem to fit particularly well, but it's there and not bad at all. Some have also mentioned that the seats are removable for easier installation. I didn't and it was still pretty easy. I'm not sure how useful it would be to remove the seat? But if that's what you want to do, go ahead. There are no instructions, but everything is quite simple. Just remember that you will need a small pickaxe/awl to remove the headrests from the seat on these trucks. They don't stretch right away! That's easy. Google it. I have had 3 different sets of seat covers for this Sierra and they are by far the best and definitely the best value for these trucks.