Freightliner S2G Gas Chassis Locking Fuel Door
2018–2026 Freightliner S2G Gas Chassis — exposed threaded fuel cap, no factory door. The Work Truck Fuel Vault bolts over the filler area and locks it shut. Gasoline medium duty.
Fitment Details
- Model Years
- 2018–2026
- Chassis
- Freightliner S2G
- Body Type
- Medium Duty
- 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 S2G is fully exposed — no lock, no cover.
- A medium duty 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 S2G Gas Chassis — Common Questions
Does the Work Truck Fuel Vault fit a 2018–2026 Freightliner S2G Gas Chassis?
Yes. The S2G Gas Chassis uses exposed threaded fuel cap, no factory door. The recommended fit is the Large Fuel Vault door. Gasoline medium duty.
How many doors do I need for a Freightliner S2G Gas Chassis?
One door covers a standard S2G Gas Chassis. 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 medium duty build.
What is the warranty?
Limited lifetime warranty on the hardware, plus a 30-day money-back guarantee. Free shipping within the United States.