Good afternoon all. I have also been searching for this as I drive a fair bit for work, pulling a trailer often for this as well.
Often driving anywhere from 3 to 5 hours away into remote areas with very limited (if any) stations.
I have found the following:
Upgrade your Chevrolet/GMC 1500 (2020-2025) with a 50-gallon replacement fuel tank from Long Range America. Designed for offroad enthusiasts, this high-capacity fuel tank ensures extended driving range and fewer refueling stops. Perfect for long adventures, this durable tank is a must-have for...
longrangeamerica.com
I am looking into it, to see what is all involved. but sure sounds ideal to have double the tank capacity.