Wehrli Billet Oil Fill Cap

Fits 2001–2025 Chevy Silverado and GMC Sierra 2500/3500 with 6.6L Duramax

Part #: WCF100443

Overview

Upgrade the engine bay of your Chevy Silverado or GMC Sierra equipped with the 6.6L Duramax diesel engine using the Wehrli Billet Oil Fill Cap. Designed for durability and style, this CNC-machined aluminum cap replaces the factory plastic component, providing a sleek, high-quality finish that enhances your engine’s appearance. Crafted with precision in the USA, this oil fill cap offers a robust, anodized black finish that resists corrosion and adds a refined look to your engine bay. It’s an ideal upgrade for enthusiasts seeking a combination of aesthetics, durability, and OEM-level fitment. This billet aluminum oil fill cap is engineered to provide a secure, leak-proof seal while offering a premium feel during routine oil checks and fills. Its machined cam lock engagement ensures a tight fit, preventing accidental removal and maintaining engine integrity. Whether you’re customizing your truck or replacing a worn-out part, this cap delivers both form and function, supporting your vehicle’s reliability and appearance.

Key Features

• Made from CNC-machined billet aluminum for strength and durability
• Black anodized finish for corrosion resistance and a sleek look
• Includes an O-ring seal for a secure, leak-proof fit
• Machined cam lock engagement for easy, secure installation
• Direct OEM replacement for GM part numbers 97350955, 97216410, 12573341, and 12677347
• Compatible with 2001-2025 Chevy Silverado and GMC Sierra 6.6L Duramax engines
• Also fits 2.8L LWN Duramax and various GM LS gasoline engines