Fits: 2020 thru 2024 Chevy Silverado/GMC Sierra 2500HD/3500HD L5P Duramax Diesel

*DEF Cap does not have a lock*

These caps were designed specifically to fit the 6.6L Duramax Diesel Trucks and threads right into the factory filler neck. It is constructed of T6 6061 Aluminum and is anodized in green for fuel and anodized blue for DEF to protect it from corrosion and to give you that extra reminder to fill up with the proper fluid. The fuel cap was designed with a set magnets in the cap so you don't have to worry about losing when you forget it's on your bedrail. This cap is perfect for Duramax owners that want to keep their diesel in their tanks, while also looking good. Deter thieves and keep your fuel clean with this locking fuel cap. We designed this with flatbed and service bed owners in mind, when your fuel cap is out in the open 24/7 and shining in the sun, it may attract some extra attention, now you won't have to worry about anybody stealing your fuel cap with this secure locking design!  Replace your plastic DEF cap with our DmaxStore Billet DEF cap. This DEF Cap is a high quality replacement for your factory cap, providing improved durability, functionality and a touch of style to your Duramax. A magnet is built into the cap for easy storage during fill ups.

Fuel Cap Features:

• Magnetic mounting solutions
• Direct fitment 6.6L Duramax Diesel Trucks
• Billet 6061 Aluminum
• Secure Locking Design
• 2 Uniquely keyed keys
• Anodized Green Finish

DEF Cap Features:

• 6061-T6 Aluminum
• Blue anodizing to protect material from corrosion
• Built in magnet
• Made in the USA

Includes:

• (1) Locking Fuel Cap w/ keys
• (1) DEF Cap

Notes:

• DEF Cap does not have a lock.