AT4_Chris

Just purchased a 2021 AT4 with the 20" factory aluminum wheels. Would anyone know: 1. What the width of the stock 20" wheels are? 2. What is the max tire size - in overall diameter and width - that will fit without rubbing on the stock AT4 suspension?

Just purchased a 2021 AT4 1500 6.2L. Looking to see if anyone has inquired with a GMC dealer/service department prior to installing their aftermarket catback exhuast system themselves, as to whether or not it would void any part of the truck's warranty. I'm looking to install a Borla system on mine and would just like to see if anyone was given any concrete answers from GMC themselves, before I approach my local dealer to ask them the question myself (although the truck was purchased at a different dealership thats 2+ hours further away). Thanks in advance.