Fans keep running after shutting off engine

[MacA]

Just curious if you were able to resolve your  issue?

 

I just had the same this happen with my 2015 Silverado 5.3L. After a bit of research, I changed my coolant temp sensor and thermostat, and everything is working properly now. 

[Diverjer]

Had it checked out and the temp sensor was all that was bad.  However since I had 86,000 miles on original thermostat, I had that changed out also.  Truck is heating up faster, think thermostat may have also been opening too quick??  However the fan problem is a know problem for the sensor and I could have got by with just changing it.  

[MacA]

On 1/14/2025 at 2:36 PM, Diverjer said:

Had it checked out and the temp sensor was all that was bad.  However since I had 86,000 miles on original thermostat, I had that changed out also.  Truck is heating up faster, think thermostat may have also been opening too quick??  However the fan problem is a know problem for the sensor and I could have got by with just changing it.  

Glad you got yours fixed!! I also changed my thermostat since I was already changing the temp sensor. Wasn't that difficult to do both.

[mikeyk101]

Hopefully you used OEM thermostat and temp sensor. Certain things on these trucks can use aftermarket replacements but some really need OEM and thermostat is one of them. I replaced my thermostat last year with an aftermarket one (motorad). Worked great for several months but then began acting up and I began having overheating issues. It wasn't fully opening like it should have. I went back and replaced it with a lower temp OEM (194⁰) and no more problems. The first thermostat lasted for 7 years and I expect the OEM replacement will too.

[Diverjer]

Nope not an OEM, came from Autozone (Durlast 207 Degree).   I had some regret when I noticed it was plastic.  Guess we will see how it goes.  I know you are right, the OEM parts are just usually better, but even if I had done it myself I would have used after market- except I would have went to O'Reillys.