Fits: 2001 thru 2024 Chevy Silverado/GMC Sierra 2500HD/3500HD Duramax LB7/LLY/LBZ/LMM/LML/L5P

The OEM coolant plate is leak prone, so replace it with the DmaxStore Billet Coolant Block Off Plate. As the name implies, this is constructed of billet aluminum and features an integrated Viton o-ring to eliminate future leaks. Comes with grade 10.9 hardware. 

Features:

• Billet aluminum construction
• Integrated o-ring

Includes:

• Billet block off plate
• Grade 10.9 hardware
• Viton o-ring

DmaxStore Note:

• You will lose around 4 gallons of coolant. 
• Be sure to check coolant level after installation.
• You will need to disconnect the downpipe, removal is not required. 

Replaces Part#:

• 97941204, 12698239