6.6L Duramax Billet Coolant Block Off Plate (2001-2025)

Upgrade your rear engine cover and stop the coolant leaks for good! Our 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, our billet coolant block off plate with an integral O-ring is an upgrade for your rear engine cover and will stop the coolant leaks for good. Application Notes: Direct Replacement for GM P/N: 97941204 and 12698239.