LML Duramax Rear Engine Cover Coolant Return Plug – Fleece Performance FPE-LML-CP

Finish your LML Duramax build cleanly and professionally with the Fleece Performance Rear Engine Cover Coolant Return Plug. This billet aluminum plug seals the unused coolant return port on the rear engine cover—perfect when installing an aftermarket turbo (especially non-water-cooled units), deleting the EGR system, or completing a CP3 conversion where the factory coolant line is no longer needed.

Key Features & Benefits

• Precision-machined 6061 aluminum construction for strength, durability, and excellent corrosion resistance
• Black anodized finish with laser-etched Fleece Performance “F” logo for a clean, factory-like appearance
• High-temperature silicone O-ring included for a reliable, leak-free seal under demanding diesel operating conditions
• Direct-fit design that provides a permanent, maintenance-free solution
• Gives your engine bay a tidy, finished look after coolant line removal or custom routing
• Made in the USA by Fleece Performance Engineering

Vehicle Fitment

• 2011–2016 Chevrolet Silverado 2500HD / 3500HD 6.6L Duramax LML
• 2011–2016 GMC Sierra 2500HD / 3500HD 6.6L Duramax LML

This small but essential part is the perfect finishing touch for common LML modifications. It prevents coolant leaks and keeps your engine bay looking sharp whether you’re running a Fleece Cheetah turbo, a CP3 conversion kit, or an EGR upgrade.