I will let you know if anything changes. I replaced the thermostat. I noticed that My temperature gauge was 160 degrees which is cold, but when I turned the truck off, the fan kept running.
This seems like a common problem in 2018's GM Canyon and Colorado. I have had it happen twice thus far, so I'll have to make a decision to take it to the dealership or try to replace it myself. Your video is going to be very helpful if I decide to do it. Many times, you don't know if the dealership mechanic does a good job. All the little quirks you mentioned are sometimes issues the dealership annoys.
The fan runs because the computer is getting no reading from your faulty temp sensor. Mine starting doing this last December, rarely, then became more frequent. I finally replace the temp sensor a couple weeks ago. The thermostat is a mechanical reactive device that the computer doesn't care about. You can get away with unplugging your battery for a while to reset things, or just leaving your truck off for several hours. Eventually, don't worry, it will happen all the time. The fan will run all the time at full speed while the engine is running and about 1/2 speed when you shut off the engine. After 5 minutes or so, the fan will finally shut off.
Thank you for the helpful video I have a 2017 Colorado V6 with the same issue. I also bought an engine temp sensor, it will be a pain to fix because it's under the intake manifold but it's only a $13 part so I'm going to start there. If the issue persist this will be my next step
Unfortunately you will find the thermostat is sticking open. Check the OBD and you will find a P0128 code, indicating the coolant is getting warm enough.
If you experience that the temperature goes down that should stop the fan? Then this is something with electrical stuff and controls failure, Your temperature sensor look fine as you explain… So look like no issues with thermostat
This is an issue with GM. You would think that the fan would shutoff if the vehicle is cool but it doesn’t. When the error happens it keeps the fan on. The reason was because my thermostat was stuck on open. Very weird right? That’s the way GM designed it. The issue was the thermostat was stuck on open and that’s what triggers the behavior we see
@@mambrake my friend hope it goes well with your repairs, Still not clear for me, stuck open.. fan doesn’t stop… temperature down.. strange how these combined together? Before you repair, If the fan turns on, does the radiator give hot airflow? I think probably it’s with fan controls and electrical stuff.. as you mentioned when you remove battery it will gone for a while.. then it might work properly for a while too, meaning that the thermostat doesn’t have issues
@@maythamabdulhassan189 The truck has been repaired for a while already. It's working perfectly. I don't know if you work with new model cars but they are not your regular old school cars. The computer runs very differently. This is what the Truck does if the thermostat is stuck open. This is the behavior. The reason it stops when you unplug the battery is because it resets the computer. Sometimes it can run normally for months then the thermostat gets stuck again and behaves the same.
