What sensor causes the temp gauge in the truck to read? I know there is the coolant temp sensor under the throttle body but there is also a sensor on the lower intake that has coolant running under it, a little flat tab sensor that one wire slips on. Also, i just put a new water pump on but for some reason it doesnt seem like coolant is cycling, any ideas would help. Thank you.

 

The one that is located between cylinders #2 and #3, the single wire one that you mentioned. As far as cycling it the thermostat opening? It wont cycle until the t-stat opens and then for just a short time and if your water pump is working.

 

I am going to run it with out the thermo tonight to see if its stuck or something, it should cycle continuously with the thermo out correct?

 

Thanks for clarifying the temp gauge sensor.