Temperature guage

[Bbillman01]

I have a 2018 Tahoe that is not registering on the temp gauge and the radiator fan runs for 5 minutes after I shut it off.
I have replaced thermostat and temp sensor and still does it
Thoughts ?

 

[Doubeleive]

I have a 2018 Tahoe that is not registering on the temp gauge and the radiator fan runs for 5 minutes after I shut it off.
I have replaced thermostat and temp sensor and still does it
Thoughts ?

Seems to be a ongoing issue with BAD parts out there (specifically 2015-2020), both on the thermostat and sensor. Some people are having to replace one or the other twice or even 3 times.
that being said I would double check the sensor and harness. I would magine there is a ohm test that can be done

 

[Fless]

Seems to be a ongoing issue with BAD parts out there (specifically 2015-2020), both on the thermostat and sensor. Some people are having to replace one or the other twice or even 3 times.
that being said I would double check the sensor and harness. I would magine there is a ohm test that can be done

And a scanner should show what the ECT is reporting, in live data. Read it and see if it makes sense.

 

[Doubeleive]

And a scanner should show what the ECT is reporting, in live data. Read it and see if it makes sense.

Seen many posts just like this and it's been mostly the "new" thermostat is no good, it's been unclear what brand is being used, I can only assume not oem

 

[Doubeleive]

And a scanner should show what the ECT is reporting, in live data. Read it and see if it makes sense.

17 pages of the same issue on this forum alone

 

[Fless]

17 pages of the same issue on this forum alone
View attachment 423328

WHAT??? There's a SEARCH function? Amazing!

 

[Doubeleive]

WHAT??? There's a SEARCH function? Amazing!

it works, sometimes......

 

[ThomasD22]

Unplugged the battery?

 

[Doubeleive]

Unplugged the battery?

ya that's another issue, people do that then 2-3 days later it goes goofy again, that would be indicative of a bad sensor

 

[Bbillman01]

So I drove the car and it must have taken that for the new parts to kick in, all is working now