I purchased a used 2018 Chevy 3500 Express passenger van on Friday to replace my 12 year old Silverado.
I'm working on bringing this vehicle up to my standards. The rotors on the left side have some scoring in them and I will replace them before winter. It seems there were two braking systems available for this year vehicle, GM codes JH6 and JH9. I can't find the RPO sticker anywhere in the vehicle. What's my best bet for figuring this out?