Sounds like a bad water pump to me.
troubleshoot the coolant on a 1999 oldsmobile intruge
Liquid coolant
Why is the electric coolant fan in your 1989 Oldsmobile cutlass cierra not working?
red coolant use the dexcool
A 2000 Oldsmobile Alero with a 2.2 engine will hold approximately 13 liters of coolant. Adding coolant to your vehicle is very important.
Either your coolant is actually low or you have a coolant sensor bad.
beside thermostat
12.3 quarts
Dex-cool prestone
At the bottom of the radiator on the passangers side.
to cool the coolant in the engine
on top of the coolant resivoir