Quick Ship SKU #: MA-10089 Merchant Automotive 10089 Billet Coolant Block Off Plate 01-16 6.6L GM Duramax

Eliminate an existing coolant leak, or stop one before it starts with this block off plate from Merchant Automotive. Featuring a built-in o-ring and recessed pockets around the mounting holes, you'll be able to reuse the factory bolts to mount this cover at the rear engine coolant port.