Driving home tonight, my water temp went to over 3/4. I turned on the heater whiched helped me get it home. What are the most likely spots to check tomorrow? Thermostat stuck closed?

thermostat or fan clutch possably

Those would be my first things to check after checking the coolant level. .

Well, apparently, you need water, to register a water temp. I opened the reservoir first thing yesterday, and it was empty. I filled it with water, and double checked it this morning, before I left. I got all the way to my destination, about 10 miles, and temps were fine. When I tuned off the truck, I opened the hood and was treated to the sight of water pissing all over the place. . I'm thinking it's a hose, as I didn't see any water coming from the radiator. The fan shroud was in the way of seeing where it might be, so I'm going to take it off, to see what I can see. Any other suggestions?

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Any other suggestions?

duct tape.

as MR. RED GREEN would say ,duck tape ,a handy mans dream tool. and if your woman dont find you handsome,she might as well find you handy,,lol , hopefully its just a hose,cheap fix

It seems to have fixed it self. After it puked a bunch of water, I checked the resivoir and it was perfectly full. It's been holding temps just fine. I'
happy and lost all at the same time. I still can't figure out where all the water came from.

BTW-JB Weld is where it's at.

I'd flush the system if I were you. It could have been leaking and caught a bad air bubble so it was heating the coolant in the motor without getting colder coolant from the radiator giving you a high reading. Drain it, burp it,check for leaks.

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Drain it, fill it, burp it, check for leaks.

might be a inntermiten thermostat problem,when u flush the coolent I would change the thermostat to on the safe side

Thanks for the suggestions everyone. I think the most likely cause is an air bubble. I did see coolant driping off one of the hoses at the bottom of the radiator.