Grey Jay

Thanks everyone, I am not asking if i should get winters. I am getting them, always have had them. The 20s came stock on the truck but I cannot find a 20" black steel winter rim. Will have to go to a 17 or 18" rim size so I am asking what tire size people are going with because the closest OD matching size is only available in LT. Also asking what happens when you don't have sensors in your tires. In the toyotas I have always had, the tire light comes on after about 20mins of driving thats all. Am I going to get anything else from my GMC, like a giant error message on the screen?

Hi, this is my first GMC. It came with 275/60R20 tires. Just wondering what people are using for winter tires? What size? does it mess up your speedo using a different size? Are you using pressure sensors? If not what happens? I have always had toyotas and used P rated bridgestone Blizzaks. They are not available in the close sizes as I ca only seem to find LT rated tires in the closest size that matches 275/70R18