🚗 Keep Your Cool with GM's Best!
The ACDelco GM Genuine Parts 15-11057 Engine Coolant Thermostat Water Inlet Assembly is a high-quality replacement part designed to repair leaking thermostat housings and prevent engine overheating. Manufactured to GM's original equipment specifications, this lightweight assembly ensures a perfect fit and reliable performance for your GM vehicle.
| Brand | GM Parts |
| Material | Basic |
| Item Weight | 10.56 ounces |
| Vehicle Service Type | Basic |
| Weight Class | Lightweight |
| Global Trade Identification Number | 40707773594795 |
| Manufacturer | AC Delco |
| OEM Part Number | 12600172 |
| UPC | 707773594797 |
| Model | Water Inlet Assembly |
| Item Weight | 10.6 ounces |
| Product Dimensions | 6.2 x 4.1 x 4.1 inches |
| Country of Origin | China |
| Item model number | 15-11057 |
| Exterior | Machined |
| Manufacturer Part Number | 15-11057 |
M**E
Good fit
Easy install to -04 5.3ltr LM7
G**D
A Good OEM Part.
This is an updated Thermostat housing for older models requiring a water pump replacement. I used this on a 2003 Express with the 6.0L gas engine. People have knocked this for being made in Japan. It's a lot better than Chinese made junk. Works well and the Thermostat has a seal on it. Recommend using a sealant for the housing to water pump.
R**G
Genuine GM part
Thermostat worked well but wasn’t the problem
A**R
Gm parts
New in box as expected, it is 2 pieces, the thermostat and the housing they are just pictured with the tstat inserted into the outlet housing. Easy install and better than murray brand.
T**.
Worked great while replacing the water pump and getting a design upgrade too!
This was a perfect solution for my GMC 2001 5.3L Yukon. It came complete with the thermostat which is not shown in the stock picture and a new upgraded gasket that fits perfectly on the housing. A nice upgrade in design from the original Water pump inlet and fits perfectly! I used this when replacing my water pump (ACDelco 251-743)along with an ACDelco 38158 Drive belt tensioner so every part of the water pump unit would be new. I also changed the fan and AC belts while I was at it seeing as everything was already taken apart and accessible. All parts where ACDelco and purchased right here on Amazon.I chose not to use any RTV silicon because everything was nice and snug and both parts worked hand in glove with each other and the engine block. I am very pleased both with the parts and the convenience of picking up everything in one place with quick delivery at a good price. There is also a lot of satisfaction from doing this yourself with the help of a few youtube videos!
A**.
Did not fit.
Quality seems good, but it did not fit my son's 2003 Silverado with a 5.3L engine. His truck has the "integrated" thermostat/housing. Didn't realize this until after I purchased this new one and attempted to replace it while replacing the water pump. Had to pick up the correct thermostat at the local auto part store. Product page did say it fit this truck, and I'm sure in some cases it would. Just not in my case.
J**N
Thermostat
Started opening around 195 degrees. Fully opened at 200 degrees. Closed around 185 degrees.
R**N
fits and works perfectly
GM genuine part works as intended; I used a tad bit of optimum grey too help seal this along with the inner seal thats already with it.
Trustpilot
4 days ago
2 weeks ago
