08 silverado radiator fan cuts on as soon as I start my truck. I checked my relays and they were good. I'm wondering if it is my thermostat, but i don't know a whole lot about vehicles. Some advice would be appreciated. Thanks

 

Welcome from Florida. I don't think the thermostat is the problem. I would check the temperature sensor. How did you check the relays? Swapping them with another one which is the same is a good way to check them.

 

Yes i swapped them with another relay with the same part number and it worked, I will definitely be checking the temperature sensor. thanks alott oldchevy