Chevrolet Silverado 4500HD Locking Fuel Door
2019–2026 Chevrolet Silverado 4500HD — dual exposed caps (fuel + def). The Work Truck Fuel Vault bolts over the filler area and locks it shut. Diesel plus DEF exposed.
Fitment Details
- Model Years
- 2019–2026
- Chassis
- Chevrolet 4500HD
- Body Type
- Chassis Cab
- Factory Fuel Cap
- Dual exposed caps (fuel + DEF)
- Recommended Door
- Small Standard
- Typical Doors Needed
- 2
Why This Truck Is a Target
- The factory cap on a Chevrolet 4500HD is fully exposed — no lock, no cover.
- A chassis cab 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.
Chevrolet Silverado 4500HD — Common Questions
Does the Work Truck Fuel Vault fit a 2019–2026 Chevrolet Silverado 4500HD?
Yes. The Silverado 4500HD uses dual exposed caps (fuel + def). The recommended fit is the Small Fuel Vault door. Diesel plus DEF exposed.
How many doors do I need for a Chevrolet Silverado 4500HD?
Most Silverado 4500HD builds need 2 doors — one for the diesel fill and one for the DEF cap. Our 2-pack and 3-pack save money versus buying singles.
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 chassis cab build.
What is the warranty?
Limited lifetime warranty on the hardware, plus a 30-day money-back guarantee. Free shipping within the United States.