I have a Grand Vitar Suzuki 2006, the light started flashing on the heater dial and the heaters was blowing cool air. My brother told me to check the antifreeze, I did and it was low, so I put some anitfreeze in the reserve. Since then, while the heat is on it smells like the car is runing hot and it is making this strange noise. What could this be?

When you filled the resevoir you could have over filled it. it should only be about half way up when the car is cool. If you over filled it, them some of it will come out when the car is hot. that would account for the smell. when it came out it could have gotten on the drive belt, this will cause the drive belt to chirp or squeal. To get it to stop, start the engine and pour some water on the belt, try to get the water on both sides of the belt. You might have to do this acouple of times. this will clean the coolant off the belt and stop the noise. Be carefull the belt will sling the water everywhere.