Service Truck Fuel Cap Cover — Complete the Security
Your Service Body Locks Everything Except the Fuel
Service trucks carry thousands of dollars in tools behind locked compartments. But the fuel — the one thing the truck needs to operate — is wide open. The Work Truck Fuel Vault completes the security package.
Founders Edition pricing — starting at $139.95 (Save up to $60)
Everything Locks Except the Fuel
Service bodies from Knapheide, Reading, Monroe, and Scelzi all feature locking compartments. But not one of them addresses the exposed fuel cap.
- Service bodies lock every tool compartment but leave the fuel exposed
- Service trucks park at customer sites, jobsites, and yards overnight
- HVAC, plumbing, and electrical trucks are prime siphoning targets
- Fuel caps on F-550, F-600, and Ram 5500 service trucks are wide open
- A single fuel theft costs $500–$1,000 in fuel and morning downtime
- No service body manufacturer includes a fuel door option
Complete the Security Package
The Fuel Vault is the missing piece. Your service body locks the tools. The Fuel Vault locks the fuel. Now everything on the truck is protected.
- Armored locking door over the fuel filler area
- Tumbler lock + security torx — matches service body security level
- Fits Ford F-550, F-600, E-350, E-450, and Ram 5500
- Compatible with Knapheide, Reading, Monroe, Scelzi, and all service bodies
- Bolt-on in 8–15 minutes — no drilling or cutting
- Made in the USA with Limited Lifetime Warranty
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.
Service Truck Operators Who Need This
HVAC
Your HVAC service truck parks at customer homes. Lock the fuel.
Plumbing
Plumbing service trucks sit at job locations all day. Protect the fuel.
Electrical
Electrical service trucks on commercial job sites need fuel security.
Fleet Managers
Lock the fuel on every service truck in your fleet.
Government
Municipal service trucks need locked fuel caps.
Upfitters
Add a fuel door during the service body build. Clean, professional.
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
Does the Fuel Vault fit service trucks?
Yes. The Fuel Vault fits Ford F-550, F-600, E-350, E-450, and Ram 5500 based service trucks. It mounts at the fuel filler near the cab, separate from the service body.
Which service bodies is it compatible with?
Knapheide, Reading, Monroe, Scelzi, and all other service bodies built on supported chassis.
Why do service trucks need fuel security?
Service trucks sit at customer locations, jobsites, and roadside pulloffs during work. They park in yards and lots overnight. The fuel cap is always exposed.
How does it install?
Bolt-on in 8–15 minutes. No drilling or cutting.
How much?
From $139.95 with free shipping.
Warranty?
Limited Lifetime Warranty and 30-day money-back guarantee.
Lock Your Service Truck Fuel — Starting at $139.95
Service truck fuel cap cover. Complete the security package. Bolt-on. No drilling. Lifetime warranty.
Secure checkout • Free US shipping • No charge until your order ships