hello first time post. i own a 2005 yukon xl that came with tires 265/70/17. i put 275/55/20 on and my extended warranty company cancelled my warranty and denied my clain approx $3000 based on the larger tires being oversized. does anyone know where to find how many 2005 yukons left the factory with the 275/55/20 on them(standard on danali) option on others. I need the info to stick it to this extended warranty company. thanks in advance. I will be happy to send you a christmas card if you can help me find this info.