The Fuel Cap Cover Built for Work Trucks
Armored • Locking • Bolt-On in 15 Minutes
Your work truck's fuel cap is completely exposed. Anyone can twist it off, siphon your fuel, or dump debris into your tank. The Work Truck Fuel Vault is the armored fuel cap cover that solves all three problems.
Founders Edition pricing — starting at $99.95 (Save up to $50)
Exposed Fuel Caps Are a Liability
Commercial chassis cab trucks ship without any fuel cap protection. The cap sits on the side of the truck — naked, exposed, and accessible to everyone.
- Every chassis cab truck ships with a completely exposed fuel cap
- No factory fuel door, cover, or enclosure is available
- Anyone can access the fuel filler in seconds — no tools needed
- Fuel theft, siphoning, and contamination are constant risks
- Body upfitters lock tool compartments but leave the fuel cap exposed
- Locking caps are a band-aid — easily defeated with basic tools
Cover It. Lock It. Done.
The Work Truck Fuel Vault is the armored fuel cap cover that fleet managers and contractors have been asking for. Full coverage, real lock, bolt-on install.
- Armored cover over the entire fuel filler area — cap, neck, and access point
- Tumbler lock with security torx fasteners — no prying, no picking
- High-strength UV-stable composite — built for outdoor commercial use
- Bolt-on in 8–15 minutes — no drilling, no cutting, no mods
- Fits all major Ford and Ram chassis cabs
- Designed and manufactured in the USA
The Part The Factory Forgot
The Work Truck Fuel Vault is an armored, locking fuel door that covers the entire fuel access area on your work truck. No more exposed caps. No more easy targets.
Why Didn't This Exist Before?
Despite billions lost to fuel theft every year, nobody built a real solution for commercial work trucks. Here's why.
"Good Enough" Thinking
The industry defaulted to cheap aftermarket locking gas caps. A $15 key-locked cap was considered good enough — until thieves proved otherwise with a pair of pliers.
Upfitters Focus on the Body, Not the Cap
Manufacturers like Knapheide and Reading engineer every compartment lock on the service body — but the chassis fuel pocket belongs to Ford or Ram. Nobody owned the gap.
The Zero-Drill Engineering Problem
Consumer billet doors are made for flat pickup beds. The recessed fuel pocket on a commercial chassis is a completely different geometry — and drilling risks voiding the chassis warranty.
The Cost Was Just "Absorbed"
Fleets treated fuel theft like weather damage. A $500 siphoning hit got buried in operating expenses. Without a purpose-built product available, the problem was simply accepted.
The Work Truck Fuel Vault is the industry's first drop-in armored fuel door that uses existing factory mounting points. No drilling. No cutting. No warranty risk.
Who Needs a Fuel Cap Cover
Contractors
Cover the fuel cap on your service truck. Stop worrying about overnight theft.
Fleet Managers
One fuel cap cover per truck, fleet-wide. Simple, effective, permanent.
City & County
Protect municipal fleet fuel caps with armored covers.
Utility
Your trucks work everywhere. Cover the fuel cap no matter where they park.
Upfitters
Add the Fuel Vault during the body build. Professional finish included.
Landscapers
Dump trucks, spray trucks, chipper trucks — cover every fuel cap.
Chassis Compatibility
Purpose-built for the most popular commercial chassis platforms in the industry.
Ford
Super Duty & Commercial Chassis
- F-350 Chassis Cab
- F-450 Chassis Cab
- F-550 Chassis Cab
- F-600 Chassis Cab
- E-350 / E-450
- F53 Workhorse
Ram
Chassis Cab Heavy Duty
- Ram 3500 Chassis Cab
- Ram 4500 Chassis Cab
- Ram 5500 Chassis Cab
Our Guarantee
Limited Lifetime Warranty
Built to last. Warranted against defects in material and workmanship for the life of the vehicle on which it was originally installed.
30-Day Money Back
Not satisfied? Return within 30 days of receipt for a full refund. No questions asked.
Free Replacements
If your Fuel Vault is defective under normal use within the warranty period, we replace it at no charge.
Frequently Asked Questions
What is a fuel cap cover?
A fuel cap cover is a protective enclosure that covers the fuel filler cap and surrounding area. The Work Truck Fuel Vault is the armored locking fuel cap cover designed specifically for commercial chassis cab trucks.
Why do work trucks need a fuel cap cover?
Commercial chassis cab trucks are sold without any fuel filler protection. The fuel cap sits completely exposed on the side of the truck — easy to access, easy to steal from, easy to contaminate.
What trucks does it fit?
Ford F-550, F-600, E-350, E-450, and Ram 5500 chassis cabs with any body type — service, utility, flatbed, dump, box, and more.
How does it install?
Bolt-on install in 8–15 minutes with basic hand tools. No drilling, cutting, or body modifications.
Does it lock?
Yes. Tumbler lock with security torx fasteners. Tamper-resistant design.
How much does it cost?
Founders Edition starts at $99.95 with free shipping.
Is there a warranty?
Yes — Limited Lifetime Warranty and a 30-day money-back guarantee.
Cover Your Fuel Cap — Starting at $99.95
Armored fuel cap cover for Ford and Ram work trucks. Bolt-on. No drilling. Lifetime warranty.
Secure checkout • Free US shipping • No charge until your order ships