Ford's Newest Medium-Duty Truck — Same Old Exposed Fuel Cap
22,000 lb GVWR • Medium-Duty Capability • Zero Fuel Security From Ford
The Ford F-600 bridges the gap between Class 5 and Class 6. Ford packed it with capability — but shipped it with the same exposed, unlocked fuel cap as every other chassis cab. The Work Truck Fuel Vault is the bolt-on locking fuel door the F-600 was missing from day one.
Founders Edition pricing — starting at $139.95 (Save up to $60)
Medium-Duty Power. Zero-Duty Fuel Security
The F-600 was designed for operators who need more than an F-550 but don't want a stripped commercial chassis. Ford engineered everything — except fuel security.
- The Ford F-600 ships with a completely exposed fuel cap — no door, no lock, no cover
- With up to 68 gallons of diesel, F-600s are high-value targets for fuel thieves
- Many F-600s run box truck, aerial, and ambulance bodies — fuel cap is easily accessible
- Locking gas caps offer minimal protection — hand tools defeat them instantly
- F-600 operators often park in commercial lots, construction sites, and public areas overnight
- One siphoning event costs $500–$1,000 in fuel plus a dead truck the next morning
Lock the Fuel on Your Ford F-600
The Work Truck Fuel Vault gives your F-600 the fuel security Ford left out. Purpose-built, bolt-on, done in minutes.
- Armored locking door covers the entire fuel filler area on your F-600
- Works with box trucks, aerials, service bodies, ambulances — any F-600 configuration
- Bolt-on install in 8–15 minutes — no drilling, no cutting, no modifications
- High-strength UV-stable composite — built for commercial fleet duty cycles
- Tumbler lock with security screws for maximum tamper resistance
- Limited Lifetime Warranty and 30-day money-back guarantee
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.
F-600 Applications That Need Fuel Security
Box Truck Operators
F-600 box trucks park at loading docks and commercial lots overnight. Lock the fuel and eliminate shrinkage.
Municipal Fleets
City and county F-600 fleets in public works, water, and road maintenance need fuel security at every yard.
Aerial Platform Trucks
F-600 aerial bucket trucks serve utility and telecom crews. Protect the fuel on trucks that work remote.
Ford Commercial Dealers
Add the Fuel Vault to every F-600 delivery. It's the accessory with real ROI your customer didn't know they needed.
Ambulance & Emergency
F-600 ambulance chassis need reliable fuel access. Protect it from tampering and contamination.
Delivery & Logistics
F-600 delivery trucks make dozens of stops daily. The Fuel Vault locks the fuel between every one.
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
Locking Fuel Cap vs. Fuel Vault
See how The Work Truck Fuel Vault compares to the alternatives.
| Feature | Locking Fuel Cap | The Work Truck Fuel Vault |
|---|---|---|
| Protection Type | Cap only | Full armored door over entire fuel access |
| Tamper Resistance | Low — pliers remove in seconds | High — armored composite, torx fasteners |
| Covers Fuel Filler Area | No — cap only | Yes — full hatch coverage |
| Prevents Siphoning | Partial — hose can bypass | Yes — sealed door blocks all access |
| F-600 Specific Fit | Generic universal fit | Purpose-built for Ford F-600 chassis |
| Install Time | 1 minute screw-on | 8–15 min bolt-on (one-time, no drilling) |
| Warranty | None or 90 days | Limited Lifetime Warranty |
Feature comparison between standard locking fuel cap and The Work Truck Fuel Vault
Protection Type
Cap only
Full armored door over entire fuel access
Tamper Resistance
Low — pliers remove in seconds
High — armored composite, torx fasteners
Covers Fuel Filler Area
No — cap only
Yes — full hatch coverage
Prevents Siphoning
Partial — hose can bypass
Yes — sealed door blocks all access
F-600 Specific Fit
Generic universal fit
Purpose-built for Ford F-600 chassis
Install Time
1 minute screw-on
8–15 min bolt-on (one-time, no drilling)
Warranty
None or 90 days
Limited Lifetime Warranty
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 the Ford F-600?
Yes. The Work Truck Fuel Vault fits the Ford F-600 Chassis Cab. The F-600 shares the same fuel filler configuration as other Ford Super Duty chassis cab platforms.
What's different about the F-600 versus the F-550?
The F-600 is Ford's medium-duty offering with a higher GVWR (22,000 lbs) than the F-550. It targets heavier applications like larger service bodies, aerial platforms, and box trucks. Same exposed fuel cap issue.
Will it fit my F-600 with a box truck body?
Yes. The Fuel Vault mounts to the chassis at the fuel filler area, not the body. It works with box trucks, aerial platforms, service bodies, and any other F-600 configuration.
Can I install it myself?
8 to 15 minutes with basic hand tools. No drilling, cutting, or modifications. Works whether you're installing at the shop or in the field.
Is there a locking gas cap option instead?
There are locking gas caps available, but they only protect the cap itself. Thieves remove them with pliers in seconds. The Fuel Vault covers the entire fuel access area with an armored, tamper-proof door.
How much does it cost?
Founders Edition pricing starts at $139.95 with free shipping. Fleet discounts available.
Is there a warranty?
Yes — Limited Lifetime Warranty and a 30-day money-back guarantee.
Lock the Fuel on Your F-600 — Starting at $139.95
Ford built the F-600 for heavy work. The Fuel Vault makes sure nobody steals the fuel that powers it.
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