When the truck is idling for a while it starts to over heat. I check the coolant it is fine so here is what I do know: The radiator has not been flushed the truck has 80K Miles on it. The serpentine belt needs to be change very badly. The fan clutch after running for a while I can spin it easily. I assume it is most likely the clutch thought I would confirm with you guys to see if you all agree.

Thanks,

J

 

Replace the belt and fan clutch and you should be good to go.

 

Have you been having to add coolant, is your level low?
Is the electric fan on the front of your truck coming on when driving in town and or when the a/c is on?