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Description
Merchant Automotive 10543 Water Pump (With Housing)Replace the failing water pump in your 2006 2016 GM 6. 6L Duramax with the Merchant Automotive 10543 Water Pump Kit (With Housing). 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
Replace the failing water pump in your 2006-2016 GM 6.6L Duramax with the Merchant Automotive 10543 Water Pump Kit (With Housing). 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.
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.
Features:
- All In One Kit
- OEM Style Water Pump
- Restores Factory Like Function
- Includes Flywheel Lock, Gaskets, & O-Rings
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
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.
Note:
The harmonic balancer balancer bolt will need to be removed to replace your water pump.
The factory bolt is a torque-to-yield fastener (TTY) for one time use and must be replaced.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Well worth the price
Color: 4.5inch Combo Light
I don't have anything long-term to report
Shipping was fantastic
Build quality and coating are great
These punch above their price point for sure with brightness
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
★★★★★ 5
Solid Insulation and Reliable Performance
Size: 100 Feet, Size: 100 Feet
I recently used the 12 Gauge 2 Conductor Flexible Parallel Electrical Wire for a simple switch installation on my Jeep JL's Hatch LED lights, and I’m really pleased with how it performed. The wire feels well insulated, which is important for any low voltage application. It provided a reliable connection, and the oxygen-free copper made sure I got a solid, clean signal for my setup.
The flexibility of the wire was another highlight—it was easy to work with, and I was able to route it through tight spaces without any issues. The red and black color coding made it straightforward to identify and manage the wires, ensuring I didn’t mix up the connections. This is definitely a solid option for automotive, solar panel, or LED strip lighting projects.
Overall, this wire is durable and effective for low voltage applications. It worked great for my Jeep JL, and I’m confident it would perform equally well in other vehicles or outdoor setups. If you're looking for quality low voltage wire, this one definitely gets the job done.
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Reviewed in the United States on June 9, 2025
★★★★★ 5
Highly recommend
Size: 100 Feet
I was pleasantly surprised about the quality of this wire. Very easy to use. Flexible yet truly 18 gauge copperwire. The insulation is good.
I used this wire to run some cab lights inside my fishing boat. I also ran battery charge level indicators and a phone charge. I highly recommend this wire.
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Reviewed in the United States on January 27, 2026
★★★★★ 5
Good wire
Size: 40 Feet
Teenage daughter wanted shiny aftermarket stuff, daughter got shiny aftermarket stuff.
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Reviewed in the United States on April 5, 2026
★★★★★ 4
Good quality wire, but thicker than expected
Size: 100 Feet
The wire itself is great quality — sturdy and well-insulated. I bought it to wire up several COB LED lights, but the individual wires and outer sheath were a bit too thick to fit into the press connectors I was using. It’ll work perfectly for other projects, just something to keep in mind if you’re using tight-fit connectors.
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Reviewed in the United States on October 15, 2025