PPE DEF Cap for Chevy/GMC (2020-26) 3.0L & 6.6L Duramax

PPE’s DEF Cap is a machined replacement for the factory diesel exhaust fluid filler cap on GM 3.0L and 6.6L Duramax trucks, 2020–2026. It swaps in for the plastic OEM cap for a cleaner, more finished look at the filler.

It threads into the factory DEF filler neck and seals the tank the same way the original does, keeping dirt and debris out of your DEF supply. Fit and thread pitch match the OEM cap for these trucks.

This is a simple appearance upgrade for owners who want their DEF filler to match the rest of a dressed-up engine bay or fuel/DEF area. It’s an easy, no-cost-to-function way to ditch the flimsy factory cap.

Installation takes seconds – unthread the factory cap and thread the PPE cap on by hand. No tools or modifications required. Backed by a PPE 1-Year Limited Warranty.

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