UnderDog Diesel 2011-2016 Duramax LML Rear Engine Cover Coolant Return Plug

2011+ Duramax LML Rear Engine Cover Coolant Return Plug

This high-quality coolant return plug is CNC-machined from 6061 aluminum, anodized black for corrosion resistance, and laser-etched with the UnderDog Diesel logo for a clean, professional finish.

Each plug includes a high-temperature silicone O-ring to ensure a perfect, leak-free seal.