A damaged heater core will cause coolant or water to leak onto the passenger floorboard.
heater core has a leak replace heater core
Poor coolant circulation in the cooling system.
There is no radiator cap. The cap is on the coolant resivuar bottle on the passenger side under the hood next to the firewall
it is probably your water pump
The radiator may have debris that needs to be flushed out.
I have a 1998 Pontiac Grand AM GT that coolant sensor went bad. So how do you change it with out breaking the coolant
Low coolant? Cooling fans not working? Water pump not circulating coolant? Radiator plugged or restricted?
Adding coolant to a 2003 Pontiac Grand Am is very easy to do. The coolant can be directly added to the radiator. Make sure the engine is not hot before adding the coolant.
If that water is engine coolant, the heater core is leaking.
How do i add antifreeze to a pontiac grand am 2004
Check coolant level Perhaps thermostat is not opening to allow coolant to flow