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USD 249.33

Merchant Automotive 10549 Water Pump (With Housing)

PART# 10549 | SKU ME10549
★★★★★ ★★★★★ 5.0 (7 Reviews)

Vehicle Fitment:
2001-2005 GM 6.6L Duramax LB7/LLY | See full application list below
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The Merchant Automotive 10549 Water Pump (With Housing) is a high-quality replacement for the worn water pump your 2001-2005 GM 6.6L Duramax LB7/LLY. Water pumps are common wear items not only in diesel trucks, but in all vehicles. A failing water pump can cause catastrophic damage if not taken care of early. The water pump is responsible for keeping coolant flowing throughout your engine, keeping it cool. As your Chevy/GMC gets older, the factory water pump can start to deteriorate due to old age. If you do not have your coolant flushed at the recommended factory intervals, you could see premature failure of your water pump. This water pump kit with housing (or cover) is a great way to get your water pump replaced with factory-like components.

This Water Pump Kit includes everything you need to replace the factory water pump on your Duramax equipped truck. This kit includes a brand new water pump with cover, water pump studs, flywheel lock, and all of the necessary seals and gaskets to complete the install. This comprehensive kit was designed specifically for completing a Duramax water pump job from start to finish.

  • All In One Kit
  • Direct Replacement
  • OEM Style Water Pump
  • Restores Factory Like Function
  • Includes Flywheel Lock, Gaskets, Studs, & O-Rings/Seals

Kit Includes:
Water Pump With Cover
Water Pump To Engine Cover Seal
Flywheel Lock
2 Water Pump Studs
Bypass Pipe Seal
Upper Bypass Pipe Seal
Water Pump Outlet Gasket

Signs The Water Pump In Your Duramax Is Bad
There are a few tell-tell signs to indicate that you need to replace your water pump as soon as possible. Fortunately, most water pumps will show symptoms of failing before they completely fail. This may include a coolant leak from the weep hole, a small hole in the housing, designed to leak coolant in failure situations. You may also notice rust or deposit buildup on the internal impellor in more extreme cases. A loose pulley or a pump that is making whining noises can occur, but is less common. Lastly, if your truck is overheating, this can also be the culprit and you will want to check when diagnosing why your truck.

The crankshaft balancer bolt will need to be removed to replace your water pump. This factory bolt is a one time use bolt and must be replaced.


  • MPN 10549
  • SKU ME10549
  • ID 81461
  • Manufacturer Name Merchant Automotive
  • Shipping Weight 10.00 lb.
  • Shipping Length 13 in.
  • Shipping Width 8 in.
  • Shipping Height 8 in.
  • Fuel Type Diesel
  • Prop 65 Prop 65 WarningWARNING: Cancer & Reproductive Harm -
  • Cross Reference # 19113733, 97216136, 19168888, 94011694, 94013304, 97188663, 42349, 42349BH, 252838, 252-838, 251723, 251-723
  • Internal L24R2


★★★★★ ★★★★★
5.0/5 Stars out of 7 Reviews
Verified Buyer
The best delivery, on time.
Verified Buyer
MA Water Pump #2049050
Blew my stock water pump so I installed the MA water pump. Truck’s temperature is better, no coolant leaks, and it came with all the gaskets!
Verified Buyer
2002 LB7 Duramax Water Pump (#1860228)
This kit comes with all necessary gaskets, crankshaft locking tool, and an upgraded MA water pump. It has been on the truck for a month with no issues.
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