Leaking isn't the only thing that can cause overheating in a car. It's possible that the thermostat has gone bad and needs to be replaced.
If there is coolant coming from it and it isn't a hose.
Yes they do at the intake manifold.
your heater core is probably gone
It is cheaper to replace it with a remanufactored pump.
you could have a heater core leaking or your windshield is leaking and the water is running down behind the dash and onto the floor.
Possibly air conditioner drain hose is clogged
broken hose to the power steering reservoir or the rack on the firewall is leaking badly or the reservoir has a hole in it.
Yes, a restricted or leaking radiator can cause the engine to overheat.
Engine coolant leaking internally and/or externally.
Replace the pump before the serpentine belt and rack and pinion are damaged.
To change a thermostat on a 2003 Chevy Impala remove the connectors to the battery, wait for the coolant system to be drained and take out the radiator hose. Remove the thermostat and clean it's component, position the thermostat, put the new gasket on top of the thermostat and put engine oil on the bolts. Attach the radio hose and fill the system with coolant. Put the negative part of the battery cable to the terminal and let the car run for a few minutes before driving.
Dean drives a 1967 Chevy Impala. Wanna find out more about supernatural? Go to http://www.supernatural-the-series.blogspot.com