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GM GENUINE PARTS

GM Genuine Parts 15-11073 (12622316) Engine Coolant Thermostat and Housing Assembly

  • Based on 972 reviews
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Availability: In Stock.
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Arrives Wednesday, Sep 30
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Features

  • Repairs leaking thermostat housings
  • Corrects engine overheating caused by failed thermostat
  • GM-recommended replacement part for your GM vehicles original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function

Description

ACDelco GM Original Equipment Engine Coolant Thermostat/Water Inlet Assemblies contain the engine thermostat and water inlet housing and are GM-recommended replacements for your vehicle’s original components. The engine coolant thermostat controls the flow of coolant through the radiator to enable the engine to reach and maintain its normal operating temperature. The water inlet housing connects the radiator hoses to the thermostat. For certain applications, the water inlet contains threaded holes or ports for sensors and switches. These original equipment engine coolant thermostat/water inlet assemblies have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Brand: GM GENUINE PARTS


Model Name: Coolant Thermostat


Controller Type: Manual


Special Feature: Genuine, OEM part with nationwide warranty at any licensed dealership


Color: Multicolor


Controller Type: Manual


Additional Features: Genuine, OEM part with nationwide warranty at any licensed dealership


Specific Uses For Product: Automotive Engine Cooling


Temperature Control Type: Automatic


Connectivity Technology: Wired


Power Source: Not Powered


Voltage: 230 volts


Display Type: analog


Control Type: Button Control


Control Method: Touch


Connectivity Protocol: Wi-Fi


Mounting Type: Surface Mount


Color: Multicolor


Shape: Round


Product Style: Classic


Item Weight: 11.68 ounces


Specification Met: GM OE


Brand Name: GM GENUINE PARTS


Model Name: Coolant Thermostat


Included Components: Coolant Thermostat


Model Number: 15-11073


Manufacturer Warranty Description: 24 month / unlimited mile limited warranty on parts sold on or after 04/01/18. (parts only) please see acdelco. Com for more details.


UPC: 707773658994


Global Trade Identification Number: 94


Manufacturer: ACDelco


Number of Items: 1


Unit Count: 1 Count


Item Type Name: Coolant Thermostat


Manufacturer Part Number: 15-11073


Material Type: Brass, Stainless Steel, High-temperature Plastic


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 30

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • It works
Good thermostat, good price. Like everyone else, I got a P0128 in my 2005 Chevy Colorado 5cyl. I don't think my original thermostat stuck open, but rather lost its calibration. Driving around with the scan tool connected, I was topping out at a steady 165 degrees everyday. Gauge showed around the 1/4 way mark. I think my normal was just below the 1/2 mark. This new thermostat is said to be a little hotter and it is. I'm now at 196-200. Gauge slightly above the 1/2 mark. Install was ok. I did not remove the tire. I had enough room to work around it. I did remove the wheel well piece. 10mm and some extensions and a universal to remove the stat. If I used my little 1/4 inch drive set, I probably could have gotten away without the universal joint. The bolts were not super tight, I could easily loosen them without putting any muscle behind the wrench. The factory clamps were a bear to release with channel locks. I removed lower hose from radiator and left it still attached to thermostat. Just guide it out from the wheel well. Remember the path you took. I purchased a new hose too, didn't want to take a chance that I might need to cut the old hose. I assembled new hose and stat to the same position as the old and guided it back into position. Holes lined up and hose was in a good position too. I used a little piece of tape to hold the bolts to my wrench for reassembly, and that was it. Factory clamps were the biggest pain of the job. I had regular hose clamps on hand, but just reused the factory clamps. No way they will ever snap or leak. If you choose not to mount the hose to the thermostat outside the truck, you might want to remove that tire so you have more room to struggle with the clamp. The check engine light went out on the next morning drive as soon as it warmed up, so don't reset the code if you are coming up on inspection in a heavy handed emissions state like NY. ... show more
Reviewed in the United States on May 9, 2017 by Southplank
    • Fixed my issue
Fixed my issue of to cold coolant temp. I had a check engine light for coolant temp being too cold. My old thermostat was stuck open tank goodness instead of shut bc I could still drive it while the part came. It was the perfect fit and it has been in my truck for at least three years, so I'm gonna say the quality it very good. It returned the Heat level back into operating range!! ... show more
Reviewed in the United States on September 13, 2025 by Hubs
    • Great price and OEM Quality
OEM Thermostat for my 2004 Colorado. My truck used to run about a little over the 1/4 mark on the temp gauge but with this thermostat it is now closer to the half way mark which is indicative of the update they did to these to bring them up to 195 degree instead of 180. I was getting a P0128 code so my original thermostat was stuck open. To replace this, loosen your lug nuts on the drivers side wheel, jack the truck up on the drivers side, place a jack stand underneath the frame rail for safety, remove the wheel and the wheel splash shield held on by 6 plastic clips. Place a bucket or a catch pan underneath the truck and remove the lower radiator hose at the radiator. This will allow you to get rid of the old coolant that can accumulate sludge. Then also run a gallon of distilled water through the radiator and let it drain out. Also remove overflow bottle and drain that and clean it. I used two 9 inch long 1/4 extensions along with a swivel 10mm 6 point socket to remove the bolts. Once bolts are out pull the old thermostat housing away and the hose off the truck, so you can then have access to remove the stubborn clamp better.. Make sure you remove the old o-ring if it stays on the engine block. Wipe clean the mating surface. Put it all back together and fill with almost 2 gallons of Dex-Cool which you can also get on Amazon for a great price. I got rid of the stubborn clamp and used 2 regular worm type clamps I purchased at Vatozone. Easier to deal with than the OEM clamp.Tightening them from underneath the truck with my long extensions. Truck now runs about 2 tick marks shy of half way. ... show more
Reviewed in the United States on February 20, 2017 by Jackson Cruz
    • Works great!
Installed on a 2004 GMC Canyon with the 5 cylinder engine. Old one was stuck open. Works great, heat working again.
Reviewed in the United States on April 2, 2026 by Power 165
    • Well, it works but its warm
I installed this on my 07 hummer h3. Like many others have stated, GM must have updated this thermostat to run warmer than the stock thermostat because my temp gauge is now over the middle line under normal driving conditions. The temperature on my scanner reads between 205-220 between driving and idling. It's not terrible to install, but definitely annoying. You have to take the driver side front wheel off, wheel liner out, and then use a swivel socket adapter to get the top bolt off the thermostat housing. I used some tape to hold the bolt to the socket for reinstallation. It's not impossible, but especially if you have larger arms like myself, it's hard to fit your hand between the spring bucket and engine block to maneuver the thermostat into place. I also used silicon grease to hold the oring in place during installation. ... show more
Reviewed in the United States on February 12, 2024 by Peter
    • Works
My 2006 Colorado 3.5L now gets up to the correct operating temperature in a timely manner. *Runs "hotter" on older trucks due to them being calibrated for colder, discontinued thermostats*. No complaints. This has the same Behr stamp as the OEM thermostat has. I've put this job off for over a year because I hate messing with coolant and knew it was a PITA to change. And boy did it not disappoint!! No room to maneuver, lines and other things right in the way, no universal joint socket to use as others have suggested, and coolant covered parts. But after 1.5hrs, I managed to get it completed all without taking the wheel off or raising the truck. Just have patience and remember how the hose snakes thru other components. ... show more
Reviewed in the United States on October 19, 2019 by Jessica J.
    • Perfect
Needed a new one for my 2008 Hummer H3. This one fit and works great! I'm very satisfied. I'm giving it a one star for "Easy to Install" because where it is in my truck is an odd place and was a PITA to install
Reviewed in the United States on June 8, 2023 by Kenny D
    • Factory thermostat (ACDelco made in Mexico), excellent price, simple fix.
Similar to Sparky's review, I bought this thermostat for my 2005 Colorado (4-cyl) which seemed to have a low coolant temp at normal run. The thermostat was original equipment and the truck has around 160k miles and it seemed to take a long time for the heater to warm in winter. I would occasionally get a PO128 error (coolant taking too long to warm) and the coolant would hover around 160-170 F at 1/4 mark on the temp gauge (I keep a scan gauge plugged in). The replacement keeps the coolant around 198-200 deg, just above 1/2 on the gauge, which should be the normal operating temp. Not having the truck from new, I don't know what the original 'normal' operating temp was and the truck seemed to do fine at 165 except for the PO128. I've read that apparently GM changed the 'normal' operating temp from lower to higher to aid in emissions and increase MPG shortly after 2005. The thermostat comes with the o-ring as seen in the photo, there is no other gasket or sealing required. R&R for this and both radiator hoses took a couple hours because I wasn't in a hurry. It's a simple matter of removing left front tire and splash shield for access. Would be nicer if the radiator had a drain, but removing the lower hose from the rad does the trick. Don't bother trying to remove the hose from the old stat, just unbolt and take the hose/stat off together. Some hoses have a white line to line up the hose with the stat top vane to keep the hose positioned correctly, the hose I got with this stat did not. It was a bit of work to get the new hose on the stat in the correct position, but having it positioned correctly made the bolt holes of the stat line up cleanly with the mount holes in engine (hose is one-way and position is important - new stat to hose, stat to engine, hose to rad... done). You can find a detailed R&R with photos on the 355 nation website (the GM frame code for this truck is 355) tech area; how to's; performance and maintenance. ... show more
Reviewed in the United States on February 25, 2014 by John G

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