Well i realized that when i drive to school in the morning..i could have the truck idling warming up for a couple mins before i take off and the cooling fan turns on after a few mins of idling..the engine temp gauge is still on cold, why does the truck do that? and can i put a grill cover on like the one in the attchement so that it warms up a little faster?. (the temp in the morning is around 30 Degrees F. )

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Your could try a grill cover but remember to take it off when the outside temp rises again or you could overheat the truck. When I was going to school in freezing Nebraska, I used to shove a piece of cardboard over the radiator in the mornings to help warm up my old truck.

 

Personally I'd never run one of those covers. I know more than one person who has overheated their vehicle thanks to those. But, your call. As for the coolant fan turning on, could be a malfunctioning sensor? Also if you have a/c make sure it's completely turned off.

 

I would say just check to see if it is a bad sensor. If you have to just rig up a toggle switch to turn them on and off manualy. Since its an eletric fan you dont need one of the covers.

 

Well i wouldnt have it covering the whole grill, i would leave mabey 1/3 open, so i dont think it would over heat and about the fan, where would the sensor be? i dont want to rig a toggle switch because doesnt it run when idling and when under a certain speed, then shut off when you get up to that speed because the air just comes through the grill itself? thats how i thought it worked...and if it does i dont wanna have to turn it on and off.

and thanks for the help!

 

Fan on and off is dictated solely by temperature. Speed plays no part. And I believe there are two coolant temp sensors, but I could be wrong about that. In any case they're not expensive, replace them anyways. As for where, they'll be in obvious parts of the water jacket system, but I don't have any diagrams to show exactly where.