Built from 6061 billet aluminum, this fuel filter cap is a direct fit replacement for 2017–2024 Chevrolet Silverado and GMC Sierra HD trucks with the 6.6L L5P Duramax diesel engine. It provides improved protection—particularly in extreme cold weather when plastic caps are prone to cracking or rounding off. The billet aluminum fuel filter cap resists cracking, wear, and repeated service use better than OEM plastic, making it a proven upgrade for fuel system reliability.

Fitment

• 2017-2024 Chevrolet Silverado 2500HD/3500HD -- L5P 6.6L Duramax
• 2017-2024 GMC Sierra 2500HD/3500HD -- L5P 6.6L Duramax

Product Details

• Material: 6061 billet aluminum, machined
• Socket Size: 36mm socket for removal
• Drain Valve: Billet aluminum drain valve that requires no tools for draining
• Durability: Eliminates cracking and rounding off from water separator replacement and freeze cycles

Installation

This billet aluminum fuel filter cap is a bolt-on direct fit replacement using the same 36mm socket as your OEM cap. No special tools are required—simply remove the old cap and screw the new one on.

Check local emissions regulations before purchase. Professional installation is recommended.

Get the right part the first time.