GM 12637105 Water Pump (With Housing) 2006-2016 GM 6.6L Duramax LBZ/LMM/LML

The GM 12637105 Water Pump with Housing is the perfect solution for maintaining optimal performance in your 2006-2016 GM 6.6L Duramax LBZ/LMM/LML vehicle. Engineered to meet GM's exacting standards, this water pump guarantees reliable, leak-resistant operation, ensuring your engine stays cool under pressure. Each unit has been thoroughly tested to deliver superior performance, featuring uniform wall sections and smooth coolant-flow cavities designed for maximum efficiency.

Constructed from durable aluminum housing, the pump includes coated seals and a stainless steel spring for extended life and resilience against wear. As a GM-recommended replacement component, it offers the same quality, reliability, and durability you expect from original equipment, maintaining your vehicle’s factory specifications for fit, form, and function.

Installation is straightforward, with a design that allows seamless integration into your cooling system. It has a water pump drive type of gear and includes six mounting holes for secure attachment. Note that while this pump does not come with a fan clutch or pulley, it is crafted to facilitate easy maintenance and operational efficiency.

Offering a 24 months/unlimited miles limited warranty when installed by a GM dealer, the GM 12637105 Water Pump ensures peace of mind and performance assurance. Regular maintenance practices, such as inspecting for leaks and ensuring proper coolant levels, will prolong the life and efficiency of your new pump.

Ultimately, this water pump is not just a part; it's an essential component that plays a critical role in keeping your engine temperature in check, enhancing overall vehicle performance while safeguarding against overheating. Perfect for vehicle enthusiasts and everyday drivers alike, this replacement part stands out as a reliable choice for maintaining one of your vehicle's most vital systems.

• Thoroughly tested for reliable, leak-resistant performance
• Uniform wall sections and smooth coolant-flow cavities for efficient operation
• Coated seals with a stainless steel spring for durability
• GM-recommended replacement part for your GM vehicle's original factory component
• Offering the quality, reliability, and durability of GM OE
• Manufactured to GM OE specification for fit, form, and function

• An ACDelco GM Original Equipment Engine Water Pump circulates coolant through your vehicle's radiator and engine system to help maintain proper engine temperature and performance. This original equipment water pump has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

• WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

• Warranty

  24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

• Product Specifications

  Housing Material	Aluminum
  Outlet Quantity	1
  Mounting Hole Quantity	6
  Hub Height	68 mm
  Hub Height	2.68 in
  Water Pump Drive Type	Gear
  Fan Clutch Included	No
  Impeller Rotation	Standard
  Pulley Included	No
  Includes Back Housing	No
  Installation Warnings	No
  Mounting Hardware Included	No
  Related Cooling Fan Components	None
  Thermostat And Housing Included	No
  Impeller Material	Plastic
  Classification	OE

• Good Maintenance Practices:

  • Clean all excess dirt and debris from the water pump housing.

  • Run your vehicle to increase engine temperature, and ensure the system is pressurized.

  • Inspect for leakage at the water pump outlet housing or the rear cover gasket, and leakage at the water pump vent or weep hole.

  • A stain around the weep hole is acceptable. However, if a weep occurs with the engine running and the coolant system pressurized, then the water pump should be replaced.

  • Clean and reinstall the coolant recovery reservoir before flushing the cooling system.

  • Flush the cooling system completely, using power flush equipment or thermal cycling the system with clean water three times. The most effective method of system flushing is to use a coolant exchanger, following the manufacturer's operating instructions.

  • Do not use any non-approved flush agents and replace the coolant according to manufacturer's specifications.

  • Clean all sealing surfaces, and make sure all old gasket material is removed before installing your replacement component.

  • Never strike the water pump shaft, since this will damage the new water pump.

  • Torque all bolts according to the manufacturer's specifications and adjust belts to proper tension (if applicable) to manufacturer's specifications.

  • Use sealant tabs only if recommended. Some sealant tabs or similar compounds may restrict coolant flow through the passages of some cooling systems.

  • With the new pump installed, turn the hub by hand and check for rotation.

  • After installation, pressure-test the system for leaks and check for sufficient fan blade clearance between the blade and radiator shroud.

  • Inspect related components in the cooling system, including your fan blades, fan clutch, engine mounts, radiator, belts and hoses, and reservoir.

  Leaking Coolant - Puddles of coolant under your vehicle, a constant drip or stream of coolant from the water pump's weep hole, or a constantly empty or low coolant reservoir are all signs of potential water pump wear, and may be caused by cracks in the pump, or seal or gasket failures.

  • Engine Overheating - If your vehicle's engine overheats, it may not be receiving the required coolant flow. Make sure that your vehicle's cooling system contains the proper level of coolant.

  • Rumbling Noise in the Pump - A rumbling, squeaking, or screeching noise near the front of your vehicle when you start it may indicate a malfunctioning water pump bearing.

  • Visible Component Wear - Worn seals, corrosion, cavitation/pitting of pump components, or a loose or wobbly pump shaft are all signs of wear that may lead to water pump failure and should be addressed.