Isuzu NPR-HD Locking Fuel Door
2012–2026 Isuzu NPR-HD — exposed threaded fuel cap, no factory door. The Work Truck Fuel Vault bolts over the filler area and locks it shut. Most common Isuzu fit.
Fitment Details
- Model Years
- 2012–2026
- Chassis
- Isuzu NPR-HD
- Body Type
- Cab Over
- Factory Fuel Cap
- Exposed threaded fuel cap, no factory door
- Recommended Door
- Small Standard
- Typical Doors Needed
- 1
Why This Truck Is a Target
- The factory cap on a Isuzu NPR-HD is fully exposed — no lock, no cover.
- A cab over 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.
Isuzu NPR-HD — Common Questions
Does the Work Truck Fuel Vault fit a 2012–2026 Isuzu NPR-HD?
Yes. The NPR-HD uses exposed threaded fuel cap, no factory door. The recommended fit is the Small Fuel Vault door. Most common Isuzu fit.
How many doors do I need for a Isuzu NPR-HD?
One door covers a standard NPR-HD. 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 cab over build.
What is the warranty?
Limited lifetime warranty on the hardware, plus a 30-day money-back guarantee. Free shipping within the United States.