DOCA diesel fuel cap for Dodge Ram 1500/2500/3500 (2019–2025) — green locking cap with keyed lock & magnet

DOCA's green locking diesel fuel cap fits 2019–2025 Dodge Ram 1500, 2500, and 3500 trucks and secures the filler with a keyed lock and magnetic holder.

This heavy-duty replacement cap is engineered to match the fuel filler specifications of Dodge Ram diesel models made between 2019 and 2025. It combines dust resistance, a keyed locking mechanism to prevent accidental loosening, and a built-in magnet so you can temporarily stick the cap to a metal surface while refueling. The vibrant green finish offers an easy visual cue and complements trucks that use colored accents or factory diesel badging.

How does the DOCA cap fit my 2019–2025 Ram truck?

The cap is manufactured to the OEM-style dimensions used on Dodge Ram diesel models from 2019 through 2025, ensuring a secure threaded seal in the fuel filler neck. Installation is simple: thread the cap into the filler and lock with the provided universal key.

• Designed for Ram 1500, 2500, 3500 diesel models (2019–2025)
• OEM-compatible thread pitch and sealing surface
• Direct replacement—no modifications required

What security features prevent the cap from coming loose?

DOCA added a universal keyed lock to stop the cap from vibrating loose or popping out while driving, giving you a more reliable seal than a standard twist cap. The lock also deters casual tampering at the pump or on the road.

• Universal keyed locking mechanism included
• Positive lock prevents accidental unscrewing from vibration
• Durable internal components resist wear from repeated use

How does the magnetic holder help during refueling?

An embedded magnet centered on the cap's underside provides a handy temporary rest point so you can keep the cap off the ground and out of the way. Stick it to any steel surface—such as the truck body or pump—to avoid dirt and scratches while filling the tank.

• Strong embedded magnet holds cap to metal surfaces
• Prevents contact with pavement or fuel spills during fueling
• Convenient placement on the truck body or pump bracket

What materials, color, and durability can I expect?

The cap is finished in a weather-resistant green coating that resists fading and corrosion from road chemicals. Internal sealing surfaces and the lock assembly are built to withstand repeated exposure to diesel, moisture, and temperature changes typical of truck use.

• Weather-resistant colored finish for long-term appearance
• Sealing surfaces designed for diesel fuel compatibility
• Sturdy construction to tolerate daily work and road conditions

Who this cap is for: Drivers of Dodge Ram 1500, 2500, or 3500 diesel trucks from model years 2019 through 2025 who want a reliable, keyed replacement fuel cap with a magnetic resting option and a visible green finish. It’s ideal for owners who value theft deterrence, a tidy refueling process, and a direct-fit aftermarket upgrade without modifications.