Dayco DP1226B Engine Water Pump

Engine Water Pump for GM HD Applications

The Dayco DP1226B engine water pump is built for select Chevrolet and GMC trucks and vans that use a serpentine belt drive with back housing. It is a direct-fit cooling system replacement for heavy-duty applications where consistent coolant circulation is critical.

• Engine water pump for select Chevrolet Express, Silverado HD, GMC Savana, and Sierra HD applications
• Serpentine belt driven design
• Includes back housing configuration
• Fits broad 2006-2016 coverage across multiple GM HD platforms
• Dayco part number DP1226B for catalog and service reference

Fitment Details

• Fits 2006-2016 Chevrolet Express 2500, serpentine belt driven with back housing.
• Fits 2006-2016 Chevrolet Express 3500, serpentine belt driven with back housing.
• Fits 2006-2016 Chevrolet Silverado 2500 HD, serpentine belt driven with back housing.
• Fits 2007-2016 Chevrolet Silverado 3500 HD, serpentine belt driven with back housing.
• Fits 2006-2016 GMC Savana 2500, serpentine belt driven with back housing.
• Fits 2006-2016 GMC Savana 3500, serpentine belt driven with back housing.
• Fits 2006-2016 GMC Sierra 2500 HD, serpentine belt driven with back housing.
• Fits 2007-2016 GMC Sierra 3500 HD, serpentine belt driven with back housing.
• Fits 2007 Chevrolet Silverado 2500 HD Classic, serpentine belt driven with back housing.
• Fits 2007 Chevrolet Silverado 3500 Classic, serpentine belt driven with back housing.
• Fits 2007 GMC Sierra 2500 HD Classic, serpentine belt driven with back housing.
• Fits 2007 GMC Sierra 3500 Classic, serpentine belt driven with back housing.
• Fits 2006 Chevrolet Silverado 3500, serpentine belt driven with back housing.
• Fits 2006 GMC Sierra 3500, serpentine belt driven with back housing.

What This Water Pump Helps Address

• Coolant circulation problems caused by a worn or leaking pump
• Engine overheating from reduced coolant flow
• Noise or bearing wear at the water pump assembly
• Cooling system service on Chevrolet Silverado HD and GMC Sierra HD trucks
• Replacement needs on Express and Savana vans with the correct serpentine-drive setup

Installation Notes and Tips

Verify the vehicle’s engine cooling layout before ordering, since this application uses a serpentine belt driven pump with back housing. Confirm the part number DP1226B against the existing pump and match the vehicle year, make, and model exactly to the listed fitment.

Quality Assurance

Dayco is a recognized aftermarket brand for engine drive and cooling components. This water pump is cataloged as DP1226B for accurate identification during service and replacement.