GM doesn't on their extended cab and crew cab trucks. I think the regular cab long bed has an option for a 38 gallon tank but it won't fit on the CC or Double Cab. The previous gen Rams (5 lug wheels) had an optional 33 gallon tank but I don't know how common it was.My F150 had a 36 gallon tank, which was nice
They don't offer any thing larger than a 26 gallon tank anymore?!
Oh, I understand that completely and it was a tradeoff I made knowingly. I think all the Lariat's I saw had leather seats which after 4 years with the Suburban, I decided I did NOT want.