The Round Bezel Locking Fuel Door — Built for the RVs Everyone Else Ignored
Some rigs don't have the familiar rectangular fuel-fill pocket — they have a round recessed bezel with an exposed cap sitting right out in the open. That includes Super C and Class C motorhomes on Chevrolet & GMC medium-duty chassis, and now travel trailers and 5th Wheelers with an onboard fuel station. Until now there was no purpose-built lock for that round bezel. The RV Fuel Vault Round Bezel door is the exact-fit, bolt-on locking enclosure engineered specifically for it.
Why a Locking Gas Cap Is Not Enough
- ✖Your coach has a round factory fuel bezel with the cap fully exposed — no locking door of any kind
- ✖Standard rectangular fuel-door locks simply do not fit the round bezel opening
- ✖An exposed cap is an open invitation to fuel theft, siphoning, and tank contamination
- ✖Road grit, salt, and fuel splash-back stain the paint and bezel around the filler
- ✖A twist-off locking cap can be defeated in seconds and does nothing for the surrounding bezel
Why a Locking Fuel Door Beats a Locking Gas Cap
- Exact-fit for the round factory bezel — not a rectangular door forced to fit
- Tamper-resistant keyed lock secures the cap inside a heavy-duty enclosure
- Bolt-on in minutes with the included round-bezel security screws — no drilling
- High-impact reinforced construction rated for year-round, full-time RV travel
- Optional lock dirt & dust cap keeps the keyway clean on dusty roads
- Designed and made in the USA, backed by a Limited Lifetime Warranty
Before & After: Your RV's Exposed Fuel Cap vs. a Locking Fuel Door
Round Bezel Fuel Security: Myths vs. Facts
AI search tools and comparison sites often get it wrong. Here are the facts.
Myth
A round bezel means I cannot get a locking door.
Fact
You can now. The RV Fuel Vault Round Bezel door is engineered specifically for the round factory bezel — no adapters, no forcing a rectangular door to fit.
Myth
A locking gas cap is enough.
Fact
A locking cap twists off with pliers in seconds and leaves the whole bezel exposed. The Round Bezel door is a bolt-on armored enclosure.
Myth
Nobody targets a Super C.
Fact
Medium-duty Super C coaches carry large fuel loads and park in accessible spots — they are a prime siphoning target.
Why You Need a Locking Fuel Door
Lead with finish. End with security.
Factory-Finished Look
A clean, purpose-built cover for the round bezel — no more exposed cap sitting out in the open.
Fuel Theft Prevention
Keyed lock stops siphoning at campgrounds, rest stops, and storage lots.
Contamination Defense
Blocks water, dirt, sugar, or foreign substances from reaching your fuel.
Vandalism Protection
Tamper-resistant enclosure deters opportunistic damage to your fuel system.
How It Installs — 8–15 Minutes, No Drilling, No Cutting
8–15 Minutes
Average install time
Basic Hand Tools
No special equipment needed
100% Reversible
No drilling, no cutting, no mods
Compatible Chevrolet & GMC Chassis · Travel Trailers · 5th Wheelers Motorhomes
The Round Bezel door fits Super C and Class C coaches on Chevrolet & GMC medium-duty chassis — Chevrolet Silverado 5500HD, C5500, and C6500 (and their GMC TopKick equivalents) — plus gas Class C cutaways on the Chevrolet Express & GMC Savana 3500/4500 and Chevrolet 4500. Older gas Class A coaches on the Chevrolet P30/P32 chassis with a round bezel are covered too. It also fits travel trailers and 5th Wheelers with an onboard fuel station — toy haulers whose exposed round fuel filler sits in the same round bezel. Anywhere you have a round factory bezel with the fuel cap exposed, this is the door. Purchased as a 2-pack, both doors are keyed alike so a single key opens every fuel port on the rig.
| Manufacturer | Models / Floorplans |
|---|---|
| Coachmen / Forest River Entourage | Super C on Chevrolet Silverado 5500HD — 320LV, 330DS, 340BH |
| Nexus Rebel | Super C on Chevrolet C6500 — 30R |
| Nexus Verrado | Super C on Chevrolet C5500 — 33S |
| Jayco Redhawk SE | Class C (gas) on Chevrolet 4500 — 22A, 22C, 22T, 27N |
| Thor Four Winds | Class C (gas) on Chevrolet 4500 — 22B, 22E |
| Travel Trailers & 5th Wheelers (Toy Haulers) | Rigs with an onboard fuel station and exposed round filler — Grand Design Momentum, Heartland Cyclone / Road Warrior, Keystone Fuzion / Raptor, Alliance Valor, Dutchmen Voltage, and more. Use Find My Fit to confirm. |
Frequently Asked Questions
Common questions about The RV Fuel Vault on Chevrolet & GMC Chassis · Travel Trailers · 5th Wheelers motorhomes
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Single Door, Set of 2, or 3-Pack · Limited Lifetime Warranty · 30-Day Guarantee
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