Fuel Cap Security for Your Grand Design Lineage
Fits Lineage Series F (31ZW & 31ZW5) and Limited Edition 43 Package on Ford F-550/F-600
The Problem
- ✖Your Grand Design Lineage has exposed fuel caps with zero security
- ✖Generic fuel doors and locking caps don’t fit the F-550/F-600 filler necks
- ✖Fuel theft at campgrounds and truck stops is a growing problem for RV owners
- ✖A contaminated fuel tank can cost $5,000–$15,000+ to repair
The Solution
- Fits Lineage Series F (31ZW on F-600, 31ZW5 on F-550) and Limited Edition 43 Package
- High-strength fiber-filled polymer with tamper-resistant keyed lock
- Bolt-on install in 8–15 minutes with basic hand tools
- Made in USA with Limited Lifetime Warranty and free shipping
Frequently Asked Questions
Locking Fuel Door for Grand Design Lineage
The Grand Design Lineage is a luxury Super C motorhome that represents a significant investment. The RV Fuel Vault provides the locking fuel door security that protects your fuel and DEF systems while adding a factory-finished appearance to the driver side.
Order Today — Starting at $139.95
Single Door, Set of 2, or 3-Pack · Free shipping · Limited Lifetime Warranty · 30-day guarantee
Order NowProudly Made in the USA · Patent Pending