chances are that your heater core is leaking and needs to be replaced The coolant is draining from the heater case. This is what houses the heater core and prevents the antifreeze from flooding into the car. That elbow is the drain hose for the heater case, which means your heater core is leaking and needs too be replaced. Good luck. To access and replace the heater core the dash board needs to be removed. Est. shop(not dealer) cost =$500.00 parts and labor
are you sure it is coolant? is the elbow located on the firewall? if that's the case then it's not coolant, it's condensation from the AC doing what it is supposed to do.
If it's leaking from INSIDE the firewall (away from the engine compartment) you probably have a leaking heater control valve or damaged heater core.
There is a rubber elbow on both ends of the metal pipe that connects to your PCV valve.
The best way to replace the coolant elbow is to remove the water pump and insert the new elbow before inserting the bolts for the water pump. Check that there are no pieces of the old plastic elbow lodged inside. Replace both elbows (if so equipt) at the same time. If you need additional information look for the write up of how to replace a water pump on a grand prix. Hope this helps. "G"
In one of the valve covers there is an elbow with a rubber hose attached. The elbow is the PCV valve.
If it is in the front seat... it is because the drainage plug for the a/c is clogged. I have a 95 aurora.. and it was doing same thing.. turns out the drain plug was blocked so condensation from the a/c vents/coils wasnt draining outside the car but inside onto the floor.. you will have to get under the car.. on the passenger side of the car on the firewall there is a little black rubber elbow coming out. Carefully pry it out.. be prepared though cause the water will gush out...clean out the build up in the rubber elbow and replace..
heater core leaks
Balance Eyes Elbow Follow-through
remove the belt and the housing, the elbow then pulls out, only the rubber seals hold it in
Look on the rubber elbow coming off the throttle body. It's the only sensor that plugs into that elbow.
That is the drain from the heater core housing. It will only leak coolant from there if the heater core starts leaking. This is to help prevent coolant from ruining your carpet/interior. You have a bad heater core. Time to replace it. Good luck!
For the Lumina car, it is located on the firewall basically centered behind the engine. It is a little rubber elbow coming out of the firewall. It drains directly from the elbow and the elbow can be removed and unplugged.