Specifications:

  • Brand New Water Pump
    • Not remanufactured or rebuilt
  • No core charge
  • Includes 2.02" Diameter Thermostat
  • Gaskets included as shown
  • Built to strict quality control standards

 

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

  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

4.5 / 5.0
14 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
11
1
0
2
0
Perfect part..., perfect installation video...
My water pump was easy to remove and replace. The video duration was very close to my actual times
September 30, 2017
Purchased
7 months ago
Very Good Product and Service
Pump works great, was a perfect match just as described!
December 5, 2017
Purchased
5 months ago
EXCELLENT!!
EXCELLENT PART, PRICE, AND MOST IMPORTANYLY, THE SERVICE, ABOVE AND BEYOND MY EXPECTATIONS. STAFF VERY COURTEOUS AND VERY HELPFUL. MY PART GOT LOST IN SHIPMENT, BUT NO HESITATION ON SENDING A REPLACEMENT PART AFTER MAKING ONE CALL, EVEN EXPEDITING THE SHIPMENT. WILL DEFINITELY RETURN AND ORDER FROM YOUR COMPANY AGAIN, THANK YOU VERY MUCH!!!
January 16, 2018
Purchased
3 months ago
Replacement parts sold the way they should be.
Shipped quicker than expected and fit just like OEM parts.
March 6, 2017
Purchased
1 year ago
Great product
Thank you A1 Auto! The water pump for my Chevy suburban was a perfect fit and easy to install! I’m a very satisfied customer!
April 23, 2018
Purchased
1 month ago
Water Pump
The Water Pump fit great and having a video to go by always makes this my first choice for parts!
January 25, 2018
Purchased
3 months ago
2003 Chevy 5.3 Water Pump
Parts arrived very fast (as with everything I’ve ordered from 1A Auto). Exact fit. Only been on vehicle about a day or so, should be fine.
November 19, 2017
Purchased
5 months ago
water pump order
Order was handled fast and soon as the next business day it was is way to me .
But on getting it parts wore missing , Got the site and e-mailed them , with in 12 hours or less I got a e-mail reply I like the fast answer when parts are missing The made GOOD on there 100% satisfaction , got replacement order with all the parts AT NO cost to me !! I e-mail them back inclosed was photos I took of there second box when I got it Informed them they needed better taping on all the folds so small parts don't fall out .
February 24, 2017
Purchased
1 year ago
Perfect fit fast delivery
No complaints. The kit came with everything I needed, and was a perfect OEM fit. Very fast shipping and great price. 1A Auto video for installation was very helpful.
November 2, 2017
Purchased
6 months ago
02 Silverado Waterpump
Great product. Used the awesome instructional video too!
April 1, 2017
Purchased
1 year ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 2 questions Browse 2 questions and 6 answers
so if the pump starts leaking over its lifetime, is it covered?
casey on Jun 12, 2016
BEST ANSWER: That's what the warranty says I've never had any issues. I purchased this pump for my truck because coolant was disappearing. After pulling the pump I noticed the gasket was gummed up and out of shape so I just replaced the gasket and have the pump set aside I case mine or one of my many friends that have Chevy trucks goes out. Haven't lost any coolant since gasket replacement (40,000) mi ago. So I can't speak for this pumps reliability all I can say is if you're replacing due to coolant loss make sure it's not just the gasket that could save you a 100 bill. Good luck it's a pretty easy job maybe an hour but I used gasket sealer on both sides of the new gasket so I let that set up overnight before refilling coolant. Hope this helps.
whats the temp rating for the supplied thermostat?
TOM N on Jan 10, 2018
BEST ANSWER: The temp rating is 186 degrees.

Vehicle Fit

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  • 2002-2006 Chevy Avalanche 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2005-2006 Chevy Avalanche 1500 Engine Water Pump V8 5.3L (8th Vin Digit Z) with Thermostat & Housing
  • 2003 Chevy Express 1500 Van Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2003-2005 Chevy Express 1500 Van Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2003 Chevy Express 2500 Van Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2003 Chevy Express 2500 Van Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2003-2005 Chevy Express 2500 Van Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2003-2005 Chevy Express 2500 Van Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2003-2005 Chevy Express 2500 Van Engine Water Pump with Thermostat & Housing V8 4.8L (8th Vin Digit V)
  • 2003 Chevy Express 3500 Van Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 1999-2003 Chevy Silverado 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 1999-2003 Chevy Silverado 1500 Engine Water Pump with Thermostat & Housing V8 4.8L (8th Vin Digit V)
  • 2001-2003 Chevy Silverado 1500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2002-2003 Chevy Silverado 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit Z)
  • 2003 Chevy Silverado 1500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit N)
  • 2001-2003 Chevy Silverado 1500 HD Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2003 Chevy Silverado 1500 HD Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit N)
  • 1999-2000 Chevy Silverado 2500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 1999-2003 Chevy Silverado 2500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2001-2003 Chevy Silverado 2500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2001-2003 Chevy Silverado 2500 HD Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2001-2005 Chevy Silverado 3500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2000-2003 Chevy Suburban 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2002-2003 Chevy Suburban 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit Z)
  • 2000-2003 Chevy Suburban 2500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2000-2003 Chevy Tahoe Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2000-2003 Chevy Tahoe Engine Water Pump with Thermostat & Housing V8 4.8L (8th Vin Digit V)
  • 2002-2003 Chevy Tahoe Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit Z)
  • 2003 GMC Envoy XL Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit P)
  • 2003 GMC Savana 1500 Van Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2003-2005 GMC Savana 2500 Van Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2003-2005 GMC Savana 2500 Van Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2003-2005 GMC Savana 2500 Van Engine Water Pump with Thermostat & Housing V8 4.8L (8th Vin Digit V)
  • 2003 GMC Savana 3500 Van Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 1999-2003 GMC Sierra 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 1999-2003 GMC Sierra 1500 Engine Water Pump with Thermostat & Housing V8 4.8L (8th Vin Digit V)
  • 2001-2003 GMC Sierra 1500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2002-2003 GMC Sierra 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit Z)
  • 2001-2003 GMC Sierra 1500 HD Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 1999-2000 GMC Sierra 2500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 1999-2003 GMC Sierra 2500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2001-2003 GMC Sierra 2500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2001-2003 GMC Sierra 2500 HD Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2001-2003 GMC Sierra 3500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2000-2003 GMC Yukon Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2001-2003 GMC Yukon Engine Water Pump with Thermostat & Housing V8 4.8L (8th Vin Digit V)
  • 2002-2003 GMC Yukon Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit Z)
  • 2000-2003 GMC Yukon XL 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit T)
  • 2002-2003 GMC Yukon XL 1500 Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit Z)
  • 2000-2003 GMC Yukon XL 2500 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2003 Hummer H2 Engine Water Pump with Thermostat & Housing V8 6.0L (8th Vin Digit U)
  • 2003-2004 Isuzu Ascender Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit P)
  • 2005-2006 Saab 9-7X Engine Water Pump with Thermostat & Housing V8 5.3L (8th Vin Digit M)

This part replaces:

  • Airtex AW5087
  • OE # 12456113
  • OE # 12458935
  • OE # 12556449
  • OE # 88894290
  • OE # 89017439
  • OE # 8888942900
  • OE # 8890174390
  • OE # 12562740
  • OE # 12571261
Part #: 1AHCK00019

Out of Stock

How-to Video:

(12:46 min)