Freightliner MT55 Step Van Locking Fuel Door
2012–2026 Freightliner MT55 Step Van — exposed threaded fuel cap, no factory door. The Work Truck Fuel Vault bolts over the filler area and locks it shut. Walk-in delivery chassis.
Fitment Details
- Model Years
- 2012–2026
- Chassis
- Freightliner MT55
- Body Type
- Step Van
- Factory Fuel Cap
- Exposed threaded fuel cap, no factory door
- Recommended Door
- Large Standard
- Typical Doors Needed
- 1
Why This Truck Is a Target
- The factory cap on a Freightliner MT55 is fully exposed — no lock, no cover.
- A step van build parks outside overnight where siphoning happens.
- One siphoning event costs $500 to $1,000 in fuel plus lost work hours.
- Contamination — sugar, water, dirt — can destroy an entire fuel system.
No Drilling
Bolts on with existing hardware.
15 Minutes
Basic hand tools, one person.
Made in the USA
Built in Sarasota, Florida.
Freightliner MT55 Step Van — Common Questions
Does the Work Truck Fuel Vault fit a 2012–2026 Freightliner MT55 Step Van?
Yes. The MT55 Step Van uses exposed threaded fuel cap, no factory door. The recommended fit is the Large Fuel Vault door. Walk-in delivery chassis.
How many doors do I need for a Freightliner MT55 Step Van?
One door covers a standard MT55 Step Van. If your truck has a separate exposed DEF cap, add a second door.
Do I have to drill anything?
No. The Fuel Vault bolts on using the existing filler area. No drilling, no cutting, no welding. Basic hand tools, about 15 minutes.
Will it interfere with my service body or upfit?
The Fuel Vault mounts to the chassis fuel filler area, not the body. It does not interfere with compartments, shelving, cranes, or racks on a step van build.
What is the warranty?
Limited lifetime warranty on the hardware, plus a 30-day money-back guarantee. Free shipping within the United States.