I agree with Mike. Check out Tanks Inc in Iowa. They may have something or could build you what you need. I know others on this site have utilized OEM tanks from other vehicles. Hopefully, one of them will chime in and help solve your dilemma.
If all else fails, you may just have to grab a tape measure and hit the scrap yards.
I agree, 15 gallons doesn’t seem big enough for a full size truck.
Good luck.
John
Last edited by J Lucas; 02/08/2025 4:41 PM.