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Message: <blockquote data-quote="mars2878" data-source="post: 28668" data-attributes="member: 12483">As per Auroragirl's post from GM: <a href="https://www.gmt800.com/threads/gmt-t1xx-brake-upgrade.9501/post-28623" target="_blank">https://www.gmt800.com/threads/gmt-t1xx-brake-upgrade.9501/post-28623</a>, it states that GM says that the biggest 20in tire that we can fit on our trucks is the 275/55R20. I currently have the 2025 factory 275/60R20 tires. So my tires are slightly bigger than what GM recommends. Maybe I'm barely good or maybe not? Time will tell. I'll be going on a longer drive potentially this Thursday. I'll report back on my findings.</blockquote>