Sounds like head gasket is leaking
possibly the water pump
coolant sensor replacement need it
When that happened on my 97 Lumina the coolant was leaking into the engine, and the light came on even when I added coolant because the whole system was just messed up. I had to take it in to the dealership and it cost 1,300 to fix it, so get it in ASAP before more damage happens.
If the pump is leaking or noisy then assume it is failing.
It could be the coolant overflow tank that is leaking.
The heater core has failed and is leaking engine coolant.
i had this problem the intake manifol gasket is blowed
Heater core, windshield, or a clogged cowl drain line. If the liquid tastes sweet it is coolant and the heater core is leaking. Heater core must be replaced. If not, it is one of the other 2 problems.
Intake manifold at top of engine?
your heater core is bad
If there is coolant coming from it and it isn't a hose.
A 50/50 mix of water and antifreeze
at or near the thermostat housing
Could be low on coolant.
A small radiator leak can cause antifreeze to leak on your 1998 Chevy Lumina when there are not any spots on the ground. A pinhole in a hose can also cause this.
Engine? 3.1L V6 are notorious for intake manifold gasket leaks. get it fixed soon or your engine is at risk. My Lumina had oil in coolant and coolant in oil. If there is tan foamy stuff on oil fill cap, coolant is in oil too.
Need to check the 4 corners on the intake manifold. It is common for the intake to leak engine coolant.
In a Chevy Lumina, low coolant means that the car needs more anti-freeze/coolant added. This is needed to keep the engine from getting too hot
Chevy Lumina has not the carborator.
most likely the head gasket is bad. there will also be coolant in your oil.
A pressurized coolant reservoir would have a thread on cap which acts as the " rad " cap
have coolant system pressure tested and look for the leaks
Oil pump driveshaft (also referred to as distributor) o-ring is bad. Replace, and oil will stop leaking there.