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Sinister Diesel Radiator Surge Tank Cap; Blue (17-26 6.6L Duramax Sierra 3500 HD)Find parts that fit my vehicle

Item SHG66596
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Our Price

$64.99 each

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      Product Information

      Features, Description, Q&A, Specs & Installation

      Features

      • Sinister Diesel Radiator Surge Tank Cap
      • Direct Replacement Part
      • Enhances Appearance and Visual Appeal
      • Adds a Touch of Unique Customization
      • Provides a Tight and Secure Seal to Prevent Leaks and Spills
      • Impervious to Cracking
      • Built to Withstand the Rigors of Daily Use
      • Durable CNC-Machined Construction
      • Manufactured Using Solid Billet Aluminum Materials
      • Features a Blue Anodized Finish
      • Made in the USA
      • Easy Installation
      • Backed by a 2-Year Warranty
      • Fits 2017-2026 6.6L Duramax GMC Sierra 3500 HD Models

      Description

      Bold Styling. The Sinister Diesel Radiator Surge Tank Cap is a direct replacement part designed to give your engine bay a cleaner and more refined look while maintaining dependable everyday function. It helps seal the surge tank securely to reduce the chance of leaks and spills, and it also adds a distinct custom touch that stands out when the hood is open. Built for drivers who want both form and function, this cap is a practical upgrade with noticeable visual impact.

      Construction and Appearance. This tank cap is manufactured from solid billet aluminum and features durable CNC-machined construction for strength and precision. The material choice helps make it impervious to cracking, while the blue anodized finish delivers a bold color accent with a smooth, premium appearance. Made in the USA, it is built to withstand the rigors of daily use and maintain its look over time.

      Installation. Installation is easy, making this an approachable upgrade for anyone looking to refresh the engine bay without a complicated process. It installs as a direct replacement part, and drilling is not required. The straightforward design allows for a clean changeover using standard hand tools and minimal effort.

      Warranty. This product is backed by a 2-year warranty for added peace of mind. That coverage reflects the confidence behind its materials and workmanship, giving buyers added assurance for regular use. It is a valuable benefit for anyone seeking dependable long-term performance from a quality replacement component.

      Application. This Sinister Diesel Radiator Surge Tank Cap fits 2017-2026 6.6L Duramax GMC Sierra 3500 HD models.

      Sinister Diesel SD-RSTC-L5P

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Installation & What's in the Box

      Installation Info

      Installation Time

      (approx) 5 Minutes

      Difficulty Level:

      Simple installation for anyone.

      Installation Guides

        No guide available for this part yet.

      What's in the Box

      • (1) Tank Cap

      Questions & Answers

      No questions about this product yet. Ask the First Question

      Will It Fit My Sierra 3500

      • 6.6L V8 Duramax - 17, 18, 19, 20, 21, 22, 23, 24, 25, 26