Overheating i have a 99 pontiac grand am se and it will not hold antifreeze i put stop leak in there it seems to help but my car still runs hot and when i go over 50mph it feels like im forcing my car to go could it be my transmission clutch or should i just sell it as is?

Sounds like a coolant leak, common problems on the caravan are water pump or radiator. No heat is due to low coolant.

Gm used the Barrs stop leak right from the factory to seal up new blocks. It was the kind made from walnut shells not the metal sealant. He may have used too much if you are overheating. I would do a good flush and go get the bars stop leak in the tablet form, follow directions and see if that helps. I had a persistent leak from my lower intake manifold, already replaced it once, put some Barrs in and now have zero leakage, no overheating either. I would have re-replaced the manifold's gasket but the car is just a beater. Now this stuff is a bandaid not a repair. So if you push the car hard the leak will reemerge.

Sounds like you had a sticking thermostat when you replaced the waterpump causing an air pocket. Replace the thermostat, and jack the front of the car so that the radiator cap is highest part of the cooling system. Then run the car and burp the air out of the coolant system.

1. All you need to do is remove radiator cap.
2. Run car until hot and you see antifreeze circulating
3. and more antifreeze until full

That's all that's to it.

is there a question here? Haven't seen one so far

Anytime when there is multiple issues, I pick one system when the problem is ongoing, check voltage and ground.
The fuses in picture is for instrument cluster, Check for voltage at the fuses when problem is ongoing. Use a test lite. As you can see, one fuse is hot all the time, the other goes hot with the key on.

overheating is most likely a bad thermostat, but the coolant loss is a second big concern. Does the exhaust look like steam? You could have a cracked block and the coolant is leaking into the engine. Also check the oil for contamination.

You need to find the source of the leak. it hasn't overheated yet because you keep catching it and re-filling. From your description, it sounds a lot like a bad water pump seal (part of pump) but without physically looking you can't be sure of that. when the pump seal begins to fail, internal pressure while running often will drive the seal tighter against the shaft stopping the leak. as pressure drops as the engine cools, the seal relaxes and permits seepage.
With time, that will change and it will leak all the time.

If its the 3.1L it could be your intake manifold gasket , the material used for the gasket does not react well with GM's Dex-Cool antifreeze. The leak may not be apparent at first, but I would pressure test the cooling system. If you look at the front of the motor by the belts , try to peek down at the intake manifold and check for slight seapage to an obvious leak.

If its either of the Quad-4's they were notorious for heads warping or cracking.

I suggest you go to a mechanic that knows what they're doing. You could have a gasket that needs to be replaced. I have a 2000 grand am and the water pump went. I went back to my mechanic three times because my car was still overheating and leaking. They finally figured out I needed a gasket replaced. I also had the timing chain replaced because my car was shaking they found that the piece that holds the timing chain was broke so they had to replace that too. My car doen't shake anymore. Maybe something is busted that controls your timing chain. Hope all this info helps.