The OEM tires on this truck were Bridgestone Dueller AT and they barely lasted 30,000 miles. I wasn't buying those tires again and I decided to try the Cooper AT3's. I live in the mountains and we get our share of bad weather. Our roads aren't too forgiving and I have to say these tires handled all conditions. Driving uphill in snow and ice weren't a problem for these tires. They definitely made me feel safe. I could have gotten some more miles out of these tires if I wasn't going into the winter months. I don't know why but when I replaced these tires I bought a set of Toyo Open Country AT2's. Actually a tire guy recommended the Toyo tires and they were a good tire but didn't handle as well as the Cooper tires. The Cooper's were better in bad weather. I sold the truck before I had a chance to see how well the Toyo tires held up but they are a bit more money and I don't think they would have lasted any longer than the Cooper tires. My 2015 GMC Sierra 1500 Crew Cab Denali came with Goodyear Eagle LS 275/55/20 tires and they have 23,000 miles on them and they are at the wear blocks already. This truck is getting a set of Cooper AT3's in the next few weeks.
I have half ton GMC. These tires have about 10,000 miles on them. They perform average in dry conditions and very poor in wet and/or snowy conditions. I will never buy Coopers again. Trying to save a little money on tires was a bad decision. Poor rubber technology. I'm replacing these tires next weekend with Michelins. Lesson learned!!
I bought this truck used at about 60K km. The dealer put a slightly used pair of these same Michelins on at that time. Those tire were awesome. Quiet, smooth, good mileage and treadwear. Not a winter tire (I do have auto 4x4 and anti-lock) but no issues in Edmonton City and highway driving. I put over 70K km on what was already a used tire and they still were OK for summer. No hesitation in buying another set.