Titan Fuel Tanks Fuel Tank Cap
Titan Fuel Tanks Fuel Tank Caps: Built for Serious Truck Owners
Titan Fuel Tanks has built its reputation as a leader in high-capacity, military-grade fuel storage solutions for trucks — and that same engineering philosophy extends to their fuel tank caps. While Titan is best known for its XXL replacement and auxiliary fuel tanks, the brand's fuel tank caps are purpose-engineered accessories designed to complement and protect those systems, delivering the same standard of durability and function that diesel truck owners expect from the Titan name.
The Sidekick II Non-Venting Locking Gas Cap
Titan's flagship fuel tank cap offering is the Sidekick II Non-Venting Locking Gas Cap. This cap is specifically designed for trucks equipped with tonneau covers or bed shells — a common configuration for diesel truck owners running auxiliary in-bed fuel systems. The cap eliminates fuel evaporation, odor, and spillage , making it an important safeguard for anyone who needs their fuel system to stay sealed and secure during long hauls or off-road runs.
One important characteristic worth understanding: because it doesn't self-vent, the cap must be regularly opened to vent the tank safely. This non-venting design is a deliberate engineering choice that suits enclosed bed environments where vapors could otherwise accumulate beneath a cover.
Locking Black Fuel Cap for Travel Trekker Tanks
Titan also offers a dedicated Locking Black Fuel Cap (part #9901750) engineered specifically for their popular in-bed auxiliary tank lineup. This locking cap is designed for use with the Travel Trekker 50 Gallon Auxiliary In-Bed Fuel Tank and the Travel Trekker 40 Gallon Auxiliary In-Bed Tank. It is intended for use with diesel fuel only , keeping the system properly sealed and tamper-resistant on the road or at the job site.
Why Titan's Caps Are More Than an Afterthought
For truck owners who invest in a Titan auxiliary or replacement fuel system, the right cap isn't a trivial accessory — it's the last line of defense against fuel loss, contamination, and theft. Titan Fuel Tanks are crafted from military-grade, cross-linked polymer material, and all tanks are made in the USA and backed by a lifetime warranty — and their caps are designed to be a seamless, reliable fit for that same ecosystem of products.
Whether you're protecting a Travel Trekker in-bed tank on a long-distance diesel haul or need a locking solution that works under a bed cover, Titan's fuel tank caps are engineered with the same attention to real-world truck use that defines the brand. Explore the full Titan Fuel Tanks brand lineup or browse all fuel tank caps to find the right fit for your setup.
