2001-2023 Duramax Coolant Block Off Plate - Fleece Performance

The Fleece Performance blocking plate is thicker than the stock plate and has an integral square cut O-ring with no gasket required. OE covers are prone to leakage over time, the billet coolant block off plate with an integral O-ring is an upgrade for your rear engine cover and will the stop the coolant leaks for good.

We keep these in stock and ready to ship!