Wehrli 2017-2019 L5P Duramax 2500/3500 & 2019+ L5D Duramax OEM Placement Coolant Tank Kit - Bengal Grey

Fix a known failure point and clean up your engine bay in one shot with the WCFab Fabricated Aluminum Coolant Tank Kit for the 2017-2019 L5P Duramax 2500/3500 and 2019+ L5D Duramax 4500/5500/6500. The stock plastic reservoirs turn cloudy and yellow with age — and worse, their non-replaceable sensors are notorious for failing early and throwing false low coolant warnings, forcing you to buy an entire new reservoir assembly every time. This kit solves both problems with a custom fabricated aluminum tank and an easily serviceable float-type sensor.

Why Choose the WCFab Fabricated Aluminum Coolant Tank Kit?

• Fixes the Known Sensor Failure – Replaces the non-serviceable factory sensor with a high-quality, cost-effective float-type sensor that's easily serviceable for the life of your vehicle.
• No More Cloudy Plastic – Swaps the yellowed factory reservoir for a custom powder-coated fabricated aluminum tank with a sight glass for quick coolant level checks.
• OEM Placement, OEM Mounting Points – Mounts in the factory coolant tank location with no other modifications necessary.
• Billet Aluminum Cap – Black anodized, CNC-machined billet aluminum cap included.
• Fits Stock Trucks – Direct fit on unmodified trucks.
• Easy Installation – Installs with basic hand tools.

Kit Includes

• Fabricated aluminum coolant tank with sight glass
• Black anodized CNC machined billet aluminum cap
• Easily replaceable low coolant sensor
• Overflow hose
• Mounting hardware

Installation Highlights

Mounts in the OEM coolant tank location using factory mounting points — a straightforward install with basic hand tools and no other modifications required.

Fits These Models

• 2017-2019 L5P Duramax – 2500 / 3500
• 2019+ L5D Duramax – 4500 / 5500 / 6500

Key Features at a Glance

• Serviceable Float-Type Sensor - No more replacing the whole tank when a sensor fails
• Fabricated Aluminum + Powder Coat - Durable, great-looking upgrade over yellowed plastic
• Coolant Sight Glass - Check your level at a glance
• OEM Location Fit - Factory mounting points, no modifications
• Billet Aluminum Cap - Black anodized, CNC machined

Notes

• Designed for stock trucks in the OEM tank location — if you're running a custom or compound turbo setup, verify this OEM-placement tank (not a twin-turbo-style tank) is the right fit for your build.

Questions? We’re Here to Help.

Have questions about upgrades for your Duramax? Contact FASS Motorsports and we’ll get you dialed:

Phone: 636-429-7020

Email: [email protected]