Stop Diesel Theft on Construction & Grading Fleets
Construction and grading crews park F-550s, Ram 5500s, and dump-body trucks at open, unfenced sites overnight — right next to a jobsite full of fuel. Diesel theft on active sites is one of the most reported losses in the trade, and a single siphoned tank can idle a crew the next morning. The Work Truck Fuel Vault armors the exposed fuel cap so the fuel is still there when the crew shows up.
Why construction fleets get hit
- Trucks parked overnight at open, unfenced sites with no security.
- Service and dump bodies leave the chassis fuel cap fully exposed.
- A siphoned tank means a truck — and the crew behind it — starts the day stranded.
- Thieves target sites repeatedly once they know fuel is easy to reach.
How the Fuel Vault protects
- Armored locking door blocks siphon hoses and pry attempts at the filler.
- Bolt-on in minutes across the fleet — no drilling, keeps the factory finish.
- Roughly the cost of one stolen tank per truck; many fleets see it pay back in the first month.
- Virtually unbreakable composite handles dust, mud, salt, and constant vibration.
Real-World Fleet Results
Fuel loss dropped to near zero across the yard
A regional public-works fleet outfitted 30-plus F-550 and Ram 5500 chassis after repeated overnight siphoning at an unsecured lot. Reported fuel shrinkage fell off almost immediately after the bolt-on doors went on.
Stopped repeat siphoning at remote job sites
A utility contractor running trucks parked at remote and unsecured sites installed doors fleet-wide. The exposed fuel and DEF caps were the weak point — once covered, the repeat losses stopped.
Paid for itself inside the first month
A grading contractor lost several hundred dollars of diesel from a single truck before protecting the fleet. At roughly the cost of one tank of stolen fuel per truck, the doors paid back fast.
Added as a standard buildout upgrade
A service-body upfitter now offers the locking fuel door as a visible security line item during buildout, giving fleet buyers a factory-finished theft deterrent from day one.
Illustrative, industry-representative scenarios. Individual results vary by fleet and operating conditions.
Get a fleet quote for your trucks
Tell us your chassis mix and truck count and we will return a formal quote with volume pricing and the right part numbers for your fleet.
Frequently Asked Questions
How fast does it pay for itself on a construction fleet?+
At roughly the cost of a single stolen tank of diesel per truck, most fleets recover the cost the first time a truck would otherwise have been siphoned — often inside the first month. Use the fleet savings calculator to model it against your truck count and local diesel price.
Will it hold up to jobsite abuse?+
Yes. The door is a proprietary high-impact reinforced polymer roughly 3/16" thick, non-corrosive and rated −40°F to 220°F. It is built for dust, mud, road salt, and constant vibration without cracking like thin factory plastic.
Can we install it ourselves across the fleet?+
Yes. It bolts on with basic hand tools or an impact driver in 8–15 minutes per truck using existing bezel holes or our tamper-resistant security screws. No drilling and no modification to the chassis.