Direct fit for 2020–2026 L5P Duramax trucks. 2020–2026 Chevrolet Silverado 2500HD / 3500HD L5P Duramax. 2020–2026 GMC Sierra 2500HD / 3500HD L5P Duramax. The fuel cap utilizes a secure locking design with two uniquely keyed keys to help deter fuel theft and unauthorized tank access, while the DEF cap includes a built-in magnet for convenient storage during refills.
