Fuel Cap Security for Your Grand Design Lineage F
Purpose-built for Grand Design Super C motorhomes on Ford F-550/F-600 chassis

The Problem
- ✖Your Grand Design Lineage F 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
- Precision-engineered for Grand Design Lineage F fuel cap configuration
- Heavy-duty steel construction with tamper-resistant keyed lock
- Bolt-on install in 8–15 minutes with basic hand tools
- Made in USA with 24-month warranty and free shipping
Pre-Order Today — Starting at $84.95
Single Door, Set of 2, or 3-Pack · Free shipping · 24-month warranty · 30-day guarantee
Pre-Order NowProudly Made in the USA · Patent Pending 19/632,042
