Replaces

Engine Water Pump

Frequently bought together

Description
Vehicle Fit
Warranty & Shipping
How-To & Tools
Product Reviews
Q&A

Highest Quality Materials

Made from highest quality materials that meet or exceed OEM standards

Direct Fit Replacement

Direct fit replacement part guaranteed to fit and function properly for your specific application

Quality Tested

Quality tested and built to a strict level of product standards

Item Condition: New

Attention California Customers:

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

Lifetime Warranty

This item is backed by our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will replace the part free of charge.

  1. step : Remove Intake Tube (1:10)
    • Start by using an 8 millimeter socket wrench to disconnect the negative battery cable.
    • Loosen the two clamps by the throttle body and air box.
    • Use a small flathead screwdriver to break the seal.
    • Lift the intake tube out.
  2. step : Remove fan shroud (1:50)
    • Remove the two 10 millimeter bolts with your socket wrench.
    • Unclip the small hose from the shroud.
    • Remove pins around fan shroud and gently work hose back and forth to pull fan shroud out.
  3. step : Remove fan (3:00)
    • Use a large adjustable wrench on the center nut.
    • Apply force on the wrench to break it loose.
    • Carefully pull fan out and set aside.
  4. step : Remove serpentine belt (3:30)
    • Start by double checking that your routing diagram is legible.
    • Draw out your own if it isn't to save time and confusion later.
    • Use your socket ratchet to loosen the 15 millimeter bolt located on the tensioner.
    • Turn your ratchet clockwise to release the tension and remove the belt.
  5. step : Drain radiator and disconnect hoses from water pump (4:33)
    • Release lower radiator hose and drain fluid into your drain pan.
    • Use your pliers to slowly squeeze the clamp and pull it back to drain the fluid into your catch pan.
    • Disconnect radiator hose by loosening and pulling back the clamp.
    • Use your small flathead screwdriver to gently pry up the hose and wiggle it off.
    • Make sure any water has drained out of it and set aside. Finally disconnect heater hoses.
    • Ensure that your catch pan is underneath to catch any water.
  6. step : Remove tension arm (6:40)
    • Use your wrench to remove the tension arm from the water pump.
    • Set aside.
  7. step : Remove water neck and remove pump (6:56)
    • Use your 10 millimeter socket wrench to remove the two bolts.
    • Use your torque wrench to remove the six bolts on the water pump.
    • Then using a sharp razor blade, scrape off any residual gasket material that could create a bad seal.
  8. step : Install 1A Auto water pump (8:18)
    • Put the new gasket plates on your 1A Auto water pump using the two bolts.
    • Seat the new pump and place bolts and use your torque wrench to gently snug them up.
    • Go back and torque them between 22 and 24 foot pounds.
    • Take the new O-ring that came with your 1A Auto and put it on your thermostat housing.
  9. step : Reassemble (10:10)
    • Reconnect all your hoses.
    • Put your belt tensioner back on and put your serpentine belt back on using your diagram.
    • Reassemble your fan, fan shroud, and intake pipe.
    • Finally refill with a 50/50 mixture of Dex Cool.
    • Listen for the sound of any leaks to make sure everything is connected properly.
    • Finally, reconnect the battery and start up the engine and run it for 30 seconds or so to circulate the coolant.
    • Double check your level of coolant to make sure it is at the right spot, and you are good to go.

Tools needed for replacement:

    General Tools

  • Drain Pan
  • Razor Blade / Gasket Scraper

  • Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket
  • 15mm Socket
  • 8mm Socket

5.00/ 5.0
4 reviews
5 Stars
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1 Star
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GMC Waterpump
Part was received before expected day. And secured in bubble wrap in box within a box. How to video was good eat . Had part on in no time.. will definitely buy from 1A Aouto again!
July 20, 2017
Just what I needed...
This is exactly what I needed! It was exactly as described on the website and the delivery was very quick. I will be ordering more parts from here for sure. Thanks
July 10, 2018
So very easy to shop for the parts you need. Prompt shipping and affordable prices.
October 7, 2019
Water Pump 2003 Chevrolet Silverado LS 5.3L
The water pump is easy to install ( approx 3.1 hours ) torque water pump bolts to 11 foot pounds six bolts be careful ! You will need to reuse old thermostat housing and buy a new thermostat before reinstall. Torque thermostat housing bolts also 11 foot pounds. This is an easy installation its up to you. Part # 1AEWP00066-Engine Water Pump
December 31, 2019
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
What is included?
Sara F August 24, 2017
The water pump and gaskets
Owen M August 24, 2017
water pump and the necessary gaskets.
Winston S August 24, 2017
The water pump and gaskets will be included as shown on our image. You must re use the mounting hardware however or purchase elsewhere.
Alex P August 25, 2017
All thats in picture. Water pump, pulley, gaskets. I changed my thermostat since it was apart, I had to get that separate.
Brian C September 1, 2017
As shown in the picture, the water pump assembly and new seals/gaskets are included.
CHRIS S September 6, 2017
Does the pulley come with this water pump ?
Brent S March 16, 2019
Dont remember but I remember it being a lot easier than I thought it was going to be.
Martin R March 16, 2019
This is the water pump but the pulley is not attached to it.
Emma F March 17, 2019
Yes it did for me when I ordered it awhile ago
Christopher W March 17, 2019
Yes it does.
S A March 26, 2019
Does thermostat come with the pump?
Antonio T May 20, 2019
No, this does not include the thermostat.
Christa R May 20, 2019
Does the water pump have the fan clutch for the ac on it?
Ben M October 21, 2019
No, it does not
Martin R October 21, 2019
Thank you for your inquiry, Ben! This water pump does not have the A/C fan clutch on it.
Tim K October 22, 2019

Fits the following Makes:

Year Make Model Description
2004-2006Buick Rainier Buick Rainier V8 5.3L Engine Water Pump
2002-2006Cadillac Escalade Cadillac Escalade Engine Water Pump
2003-2006Cadillac Escalade ESV Cadillac Escalade ESV Engine Water Pump
2002-2006Cadillac Escalade EXT Cadillac Escalade EXT Engine Water Pump
2002-2006Chevy Avalanche 1500 Chevy Avalanche 1500 Engine Water Pump
2003-2006Chevy Express 1500 Van Chevy Express 1500 Van V8 5.3L Engine Water Pump
2003-2006Chevy Express 2500 Van Chevy Express 2500 Van V8 6.0L Engine Water Pump
2003-2005Chevy Express 2500 Van Chevy Express 2500 Van V8 5.3L Engine Water Pump
2003-2006Chevy Express 2500 Van Chevy Express 2500 Van V8 4.8L Engine Water Pump
2003-2006Chevy Express 3500 Van Chevy Express 3500 Van V8 6.0L Engine Water Pump
2005-2006Chevy Express 3500 Van Chevy Express 3500 Van V8 4.8L Engine Water Pump
2003-2006Chevy SSR Chevy SSR Engine Water Pump
1999-2006Chevy Silverado 1500 Chevy Silverado 1500 V8 4.8L Engine Water Pump
1999-2006Chevy Silverado 1500 Chevy Silverado 1500 V8 5.3L Engine Water Pump
2003-2006Chevy Silverado 1500 Chevy Silverado 1500 V8 6.0L Engine Water Pump
2001-2003Chevy Silverado 1500 HD Chevy Silverado 1500 HD Engine Water Pump
2005-2006Chevy Silverado 1500 HD Chevy Silverado 1500 HD Engine Water Pump
1999-2004Chevy Silverado 2500 Chevy Silverado 2500 Engine Water Pump
2001-2006Chevy Silverado 2500 HD Chevy Silverado 2500 HD V8 6.0L Engine Water Pump
2001-2006Chevy Silverado 3500 Chevy Silverado 3500 V8 6.0L Engine Water Pump
2000-2006Chevy Suburban 1500 Chevy Suburban 1500 V8 5.3L Engine Water Pump
2006Chevy Suburban 1500 Chevy Suburban 1500 V8 6.0L Engine Water Pump
2000-2006Chevy Suburban 2500 Chevy Suburban 2500 V8 6.0L Engine Water Pump
2000-2006Chevy Tahoe Chevy Tahoe V8 4.8L Engine Water Pump
2000-2006Chevy Tahoe Chevy Tahoe V8 5.3L Engine Water Pump
2006Chevy Trailblazer Chevy Trailblazer V8 5.3L Engine Water Pump
2006Chevy Trailblazer Chevy Trailblazer V8 6.0L Engine Water Pump
2003-2006Chevy Trailblazer EXT Chevy Trailblazer EXT V8 5.3L Engine Water Pump
2004-2006Chevy W3500 Tiltmaster Chevy W3500 Tiltmaster V8 6.0L Engine Water Pump
2004-2006Chevy W4500 Tiltmaster Chevy W4500 Tiltmaster V8 6.0L Engine Water Pump
2005-2006GMC Envoy GMC Envoy V8 5.3L Engine Water Pump
2003-2006GMC Envoy XL GMC Envoy XL V8 5.3L Engine Water Pump
2004-2005GMC Envoy XUV GMC Envoy XUV V8 5.3L Engine Water Pump
2003-2006GMC Savana 1500 Van GMC Savana 1500 Van V8 5.3L Engine Water Pump
2003-2005GMC Savana 2500 Van GMC Savana 2500 Van V8 5.3L Engine Water Pump
2003-2006GMC Savana 2500 Van GMC Savana 2500 Van V8 4.8L Engine Water Pump
2003-2006GMC Savana 2500 Van GMC Savana 2500 Van V8 6.0L Engine Water Pump
2003-2006GMC Savana 3500 Van GMC Savana 3500 Van V8 6.0L Engine Water Pump
2004-2006GMC Savana 3500 Van GMC Savana 3500 Van V8 4.8L Engine Water Pump
1999-2006GMC Sierra 1500 GMC Sierra 1500 V8 5.3L Engine Water Pump
1999-2006GMC Sierra 1500 GMC Sierra 1500 V8 4.8L Engine Water Pump
2001-2006GMC Sierra 1500 GMC Sierra 1500 V8 6.0L Engine Water Pump
2001-2003GMC Sierra 1500 HD GMC Sierra 1500 HD Engine Water Pump
2005-2006GMC Sierra 1500 HD GMC Sierra 1500 HD Engine Water Pump
1999-2004GMC Sierra 2500 GMC Sierra 2500 Engine Water Pump
2001-2006GMC Sierra 2500 HD GMC Sierra 2500 HD V8 6.0L Engine Water Pump
2001-2006GMC Sierra 3500 GMC Sierra 3500 V8 6.0L Engine Water Pump
2004-2006GMC W3500 Forward GMC W3500 Forward V8 6.0L Engine Water Pump
2004-2006GMC W4500 Forward GMC W4500 Forward V8 6.0L Engine Water Pump
2000-2006GMC Yukon GMC Yukon V8 4.8L Engine Water Pump
2000-2006GMC Yukon GMC Yukon V8 5.3L Engine Water Pump
2001-2006GMC Yukon GMC Yukon V8 6.0L Engine Water Pump
2000-2006GMC Yukon XL 1500 GMC Yukon XL 1500 V8 5.3L Engine Water Pump
2001-2006GMC Yukon XL 1500 GMC Yukon XL 1500 V8 6.0L Engine Water Pump
2000-2006GMC Yukon XL 2500 GMC Yukon XL 2500 V8 6.0L Engine Water Pump
2003-2006Hummer H2 Hummer H2 V8 6.0L Engine Water Pump
2003-2006Isuzu Ascender Isuzu Ascender V8 5.3L Engine Water Pump
2004-2006Isuzu NP-R Isuzu NP-R V8 6.0L Engine Water Pump
2004-2006Isuzu NPR-HD Isuzu NPR-HD V8 6.0L Engine Water Pump
2005-2006Saab 9-7X Saab 9-7X V8 5.3L Engine Water Pump
Part 1AEWP00066
In Stock


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Brand #: WPA07325