To be honest I'm one of the last to write a negative review. But in this case I think it's more than justified. At first I was skeptical about this product because apparently this manufacturer mainly makes these blocks for Ford models. Even the photos just didn't look right or didn't seem to fit the wheel well of my particular vehicle. I went with the 19-21 GMC Sierra 1500 version (I have a 2020 GMC Sierra 1500) and it was completely the wrong product. and don't fit in my car at all. At first I thought it might be a simple bug, but if you look at the attached photos, the sticker on the product clearly says it's a GMC model, but the instructions and hardware that come with shipped with the product are for 2021+ Ford. To me this is either on purpose or just poor supply chain management. Of course, since a pair is around $100, I should have just returned them. However, I watched a few videos online and decided to cut off some of the plastic to try and fit. That didn't work either, leaving me with 2 very useless pieces of plastic. I hope the seller/manufacturer will do the right thing and send me the right product or refund my money. I will then adjust my rating accordingly. Until then, I STRONGLY recommend everyone to stay away from this vendor/product as much as possible.