ACDelco GM Genuine Parts 15-11125 Water Pump Outlet Assembly with Thermostat

works great and perfect fit on my 2015 gmc yukon denali

I ordered this for my 2016 Silverado LTZ. I was having issues with the temperature barely getting above 150° most of the time it wouldn’t get above 140. And with winter rapidly approaching, I decided to give it a try. Installation was quite simple. This thermostat and housing is a one piece assembly unlike the traditional ones with an aluminum reusable housing, With this particular design you just throw the old housing away and install the whole new assembly. Everything fit perfectly the instructions were straightforward and boy What a difference in heat output. You can barely hold your hand in front of the vent now and she consistently runs at 205*F after if she warms up. Very satisfied.!!!

I replace the thermostat on my silverado 5.3 2014 165k miles 6 months ago, well i put on a murray brand from Oreilly auto parts because they did not had the AC Delco in stock, it lasted 6 months and well i tought it would be the water pump because normally thermostats wont get bad specially in 6 months, saw some videos on youtube and people where saying not to replace the thermostats on this truck with an aftermarket to always use oem, i order this oem thermostat and gave it a try before i try to replace first the water pump. Worked great it did not overheat no more, so dont risk it with aftermarket for the ecotec engines.

Install this on my 2015 GMC Sierra had no issues whatsoever installation was simple parts were very well-made and I would recommend this to anyone

I had an issue where the original thermostat has gotten stuck open after 9 years. This is the exact replacement for it - it looks exactly the same as the original, perfect fitment, and I have driven on it for a few hundred miles so far. Temperatures are steady and no leaks.

This product is working as intended. Originally from GMC seal. Changed to my GMC Sierra for temperature problems, but running smoothly now!

2017 Yukon, taking forever to reach normal operating temp. These newer 5.3 and 6.2 Ecotechs are meant to run around 210* or more, which is why you want to stick with this OEM t-stat that opens at 207*. People freak out when they see temps approaching 220*, but that is actually normal and the temp where most of the time the fans are programmed to kick in. Mine was taking 10 minutes to reach that, hard on the mpg. New t-stat was just like the original, and a very easy job.

Ac delco good product