If your car is leaking coolant around the thermostat, or your thermostat housing is broken or cracked, then this could be your solution.

Specifications:

  • Engine Water Outlet
  • Aluminum construction
  • Includes thermostat (stock temperature, 187 degrees)
  • Direct replacement
  • Built to strict quality control standards
  • 2.02" (51mm) diameter opening
    • Not correct for models with 1.88" (48mm) thermostat opening

Over time from thermal expansion and contraction the mating surfaces on the housing can warp or crack. If you are experiencing any of these issues replace your thermostat housing with our direct replacement part.

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 : Draining the Coolant (0:42)
    • Twist off the coolant tank cap
    • Have a drain pan ready
    • Twist off the drain plug
    • Allow the coolant to drain
    • Twist on the drain plug
  2. step : Removing the Air Intake Hose (1:23)
    • Loosen the two air intake hose clamps with a flat blade screwdriver
    • Pull off both ends of the intake hose
    • Pull the intake hose up and out
  3. step : Removing the Thermostat (1:46)
    • Have a drain pan ready
    • Loosen the radiator hose clamp with pliers
    • Slide the clamp back
    • Pry the hose off with a pry bar
    • Remove the two 10mm bolts from the thermostat
    • Pull off the thermostat
    • Clean the thermostat housing with fine sandpaper
  4. step : Installing the New Thermostat (2:58)
    • Push the new thermostat into place
    • Insert the two 10mm bolts into the thermostat
    • Tighten the 10mm bolts to between 15 - 17 foot-pounds of torque
    • Push the radiator hose onto the thermostat
    • Slide the hose clamp on using pliers
  5. step : Reinstalling the Air Intake Hose (4:01)
    • Push the intake hose into place
    • Push the smaller hose into the intake hose
    • Tighten the two hose clamps with a flat blade screwdriver
  6. step : Refilling the Coolant (4:47)
    • Fill the coolant tank to the max fill line, using a funnel
    • Run the engine briefly
    • Add more coolant if necessary
    • Twist on the coolant tank cap

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Slip-Joint Pliers

  • Ratchets & Related

  • Ratchet
  • Torque Wrench

  • Screwdrivers & Related

  • Flat Blade Screwdriver
  • Pry Bar

  • Sockets - Metric

  • 10mm Socket

5.0 / 5.0
1 Review
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Exact part and on time
I will chose this store first in the future. Used a big box store and they sold me the wrong part that cost me time and a second fluid flush. Entered the same data into A1auto and got the correct part on time and a good price.
January 29, 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 2 answers
Will it fit the acdelco water pump and does it come with gasket?
EDDIE F on Apr 18, 2018
BEST ANSWER: This part is specific to vehicles with a particular set of options. We will need more information about your vehicle to confirm the fit. Please feel free to call our customer service department for clarification @ 888-844-3393.
05 tahoe over heating. But when I Turn on heater the engine temp goes down. Is the thermostat bad??
Oandres on Apr 9, 2018
BEST ANSWER: We are unable to diagnose your problem, because there could be multiple reasons why you're experiencing this particular difficulty. We suggest you take your vehicle to a reputable shop close to you to identify the problem. Once you know the cause of your problem please feel free to call us toll free at 888-844-3393. We'll be happy to see if we carry the parts needed for the repair.

Vehicle Fit

  • 2002-2003 Cadillac Escalade Thermostat with Housing Assembly V8 6.0L (8th Vin Digit N)
  • 2002-2003 Cadillac Escalade Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2003 Cadillac Escalade ESV Thermostat with Housing Assembly V8 6.0L (8th Vin Digit N)
  • 2002-2003 Cadillac Escalade EXT Thermostat with Housing Assembly V8 6.0L (8th Vin Digit N)
  • 2002-2005 Chevy Avalanche 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2005 Chevy Avalanche 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit Z)
  • 1998-2002 Chevy Camaro Thermostat with Housing Assembly V8 5.7L (8th Vin Digit G)
  • 1997-2003 Chevy Corvette Thermostat with Housing Assembly V8 5.7L (8th Vin Digit G)
  • 2003-2006 Chevy Express 1500 Van Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2003-2006 Chevy Express 2500 Van Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2003-2006 Chevy Express 2500 Van Thermostat with Housing Assembly V8 4.8L (8th Vin Digit V)
  • 2003-2005 Chevy Express 2500 Van Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2003-2006 Chevy Express 3500 Van Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2005-2006 Chevy Express 3500 Van Thermostat with Housing Assembly V8 4.8L (8th Vin Digit V)
  • 2003 Chevy SSR Thermostat with Housing Assembly V8 5.3L (8th Vin Digit P)
  • 1999-2006 Chevy Silverado 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 1999-2006 Chevy Silverado 1500 Thermostat with Housing Assembly V8 4.8L (8th Vin Digit V)
  • 2002-2006 Chevy Silverado 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit Z)
  • 2003-2006 Chevy Silverado 1500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit N)
  • 2001-2003 Chevy Silverado 1500 HD Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2005-2006 Chevy Silverado 1500 HD Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 1999-2000 Chevy Silverado 2500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 1999-2004 Chevy Silverado 2500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2001-2006 Chevy Silverado 2500 HD Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2001-2006 Chevy Silverado 3500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2000-2005 Chevy Suburban 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2002-2006 Chevy Suburban 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit Z)
  • 2006 Chevy Suburban 1500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2000-2006 Chevy Suburban 2500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2000-2006 Chevy Tahoe Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2000-2006 Chevy Tahoe Thermostat with Housing Assembly V8 4.8L (8th Vin Digit V)
  • 2002-2006 Chevy Tahoe Thermostat with Housing Assembly V8 5.3L (8th Vin Digit Z)
  • 2003 Chevy Trailblazer EXT Thermostat with Housing Assembly V8 5.3L (8th Vin Digit P)
  • 2005-2006 GMC Envoy Thermostat with Housing Assembly V8 5.3L (8th Vin Digit M)
  • 2003-2004 GMC Envoy XL Thermostat with Housing Assembly V8 5.3L (8th Vin Digit P)
  • 2003-2006 GMC Savana 1500 Van Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2003-2006 GMC Savana 2500 Van Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2003-2005 GMC Savana 2500 Van Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2004-2006 GMC Savana 2500 Van Thermostat with Housing Assembly V8 4.8L (8th Vin Digit V)
  • 2003-2006 GMC Savana 3500 Van Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2004-2006 GMC Savana 3500 Van Thermostat with Housing Assembly V8 4.8L (8th Vin Digit V)
  • 1999-2006 GMC Sierra 1500 Thermostat with Housing Assembly V8 4.8L (8th Vin Digit V)
  • 1999-2006 GMC Sierra 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2001 GMC Sierra 1500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2002-2006 GMC Sierra 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit Z)
  • 2001-2003 GMC Sierra 1500 HD Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2005-2006 GMC Sierra 1500 HD Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 1999-2000 GMC Sierra 2500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 1999-2004 GMC Sierra 2500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2001-2006 GMC Sierra 2500 HD Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2001-2006 GMC Sierra 3500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2000-2006 GMC Yukon Thermostat with Housing Assembly V8 4.8L (8th Vin Digit V)
  • 2000-2006 GMC Yukon Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2001-2006 GMC Yukon Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2002-2006 GMC Yukon Thermostat with Housing Assembly V8 5.3L (8th Vin Digit Z)
  • 2000-2005 GMC Yukon XL 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit T)
  • 2000-2006 GMC Yukon XL 1500 Thermostat with Housing Assembly V8 5.3L (8th Vin Digit Z)
  • 2000-2006 GMC Yukon XL 2500 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2003-2007 Hummer H2 Thermostat with Housing Assembly V8 6.0L (8th Vin Digit U)
  • 2003 Isuzu Ascender Thermostat with Housing Assembly V8 5.3L (8th Vin Digit P)
  • 1998-2002 Pontiac Firebird Thermostat with Housing Assembly V8 5.7L (8th Vin Digit G)

This part replaces:

  • OE # 12562740
  • OE # 12571261
Part #: 1AEMX00299

Ships Same Day for orders placed by 4 P.M. ET

How-to Video:

(05:22 min)