Press Release · March 4, 2026
AMI Transportation Files Patent on Armored Locking Fuel Door Built for Commercial Work Trucks
Patent-pending design targets a fuel theft problem that costs commercial fleets thousands of gallons a year, with a bolt-on solution that fits service bodies from every major upfitter.
SARASOTA, Fla., March 4, 2026 — AMI Transportation, LLC, doing business as The Work Truck Fuel Vault, today announced that its armored locking fuel door for commercial work trucks is patent pending. The product addresses a gap that has persisted for decades: work truck bodies leave the fuel filler behind a thin, unlocked door that a thief can pop open with a screwdriver in seconds.
“Every fleet manager we talk to has the same story,” said a company spokesperson. “They come in Monday morning and the tanks are empty. Nobody saw anything, nothing was reported, and the fuel card data does not explain it. We built this because the aftermarket answer up to now has been a locking gas cap, and a locking gas cap does not stop somebody who can just open the door and drill it.”
The Work Truck Fuel Vault is a hardened, bolt-on enclosure that replaces or covers the existing fuel door opening on a commercial work truck body. It installs with common hand tools in minutes, requires no drilling into the chassis, no wiring, and no modification to the fuel system. Two sizes cover the overwhelming majority of fuel door openings used across the work truck market.
The design fits chassis from Ford, Ram, Chevrolet, GMC, Isuzu, Freightliner, International, Hino, and Mitsubishi Fuso, with service, utility, flatbed, dump, and enclosed bodies from upfitters including Knapheide, Reading, Scelzi, Monroe, Duramag, Harbor, Royal, Rugby, and Stahl.
The company also produces sister products for the recreational vehicle, universal automotive, and emergency services markets under The RV Fuel Vault, Gas Protector, and The First Responder Fuel Vault brands.
About The Work Truck Fuel Vault
AMI Transportation, LLC DBA The Work Truck Fuel Vault manufactures a patent-pending armored locking fuel door for commercial work trucks in Sarasota, Florida. The bolt-on product installs in minutes with common hand tools and stops siphoning and fuel theft without modifying the vehicle. Every unit carries a limited lifetime warranty against defects and a 30-day money-back guarantee.