Wehrli 100646 Coolant Tank Kit | 2007.5-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LMM

Features:

• Replaces factory plastic coolant reservoir
• Fabricated aluminum tank with custom powder coat
• Mounts in OEM coolant tank location
• Includes black anodized billet aluminum cap
• Integrated coolant level sight glass
• Includes low coolant level sensor
• Overflow hose and install hardware included
• Improves engine bay appearance and durability
• Fits 2007.5-2010 LMM Duramax trucks
• No modifications required for installation
• Uses stock OEM mounting points
• Installs easily with basic hand tools

Make Your Engine Bay Look As Strong As It Runs

Let’s be honest, the stock plastic coolant tank on your 2007.5-2010 Duramax does the job, but it looks more like an afterthought than a part of a performance build. The Wehrli 100646 Coolant Tank Kit gives your engine bay the clean, purposeful look it deserves with a custom-fabricated aluminum tank that replaces the factory eyesore. Powder coated for durability and style, this tank adds a sharp, performance-inspired finish under the hood that complements any build. It installs right into the OEM mounting location with no modifications, making it one of the easiest upgrades you can make with the biggest visual payoff. Included in the kit is everything you need, an overflow hose, black anodized billet cap, low coolant level sensor, and mounting hardware, so there’s no guesswork or trips to the parts store. It even includes a sight glass to check coolant level at a glance. Whether you’re building a show-ready diesel or just tired of the cloudy, brittle factory tank, this upgrade hits the sweet spot between function and form.

Built For Long Lasting Performance And A Perfect Fit

The Wehrli 100646 Coolant Tank Kit is designed specifically for 2007.5-2010 GM Silverado and Sierra HD trucks equipped with the 6.6L LMM Duramax engine. Constructed from high-quality fabricated aluminum, the tank offers improved heat resistance and durability over the stock plastic version, making it ideal for trucks that see high engine bay temperatures. It mounts directly to the OEM location using factory mounting points, ensuring a clean fit without the need for any cutting or additional brackets. The tank comes equipped with a low coolant level sensor, a coolant sight glass for quick fluid checks, and an overflow hose to keep your system running safely under pressure. The billet aluminum cap is CNC-machined and black anodized for added corrosion resistance and a premium look. All necessary installation hardware is included, and the entire unit is designed for quick installation with basic hand tools. For performance-minded owners looking to upgrade reliability and engine bay aesthetics in one shot, this kit offers a well-rounded solution that’s both practical and visually refined.

Fits: 2007.5, 2008, 2009, 2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LMM

Notes:

• Designed to fit 2007.5-2010 LMM Duramax engines
• Mounts in the factory coolant tank location
• Fabricated aluminum construction replaces factory plastic tank
• Includes low coolant level sensor and sight glass
• Black anodized billet aluminum cap included
• All installation hardware and overflow hose included
• No modifications required for stock truck installation
• Uses OEM mounting points for easy fitment
• Installs with basic hand tools
• Improves both under-hood durability and appearance