How do I add coolant to my radiator. It seems there is a specific way to do it on a 2000 Impala.

Clogged radiator and leaking radiator are two different problems.
Either one, warm the car up first. Just turn it on and let idle until it comes to normal operating temperature. Once there, turn the car off and pop the hood. Carefully, touch across the radiator from one side to the other. If the radiator is clogged, one side will be cool to the touch. If one side is just cooler than the other, that is normal.
For leaks, just look around the radiator and its hoses for coolant leaks. Then look around the engine. Specifically the head(s), hoses, and freeze plugs. If no coolant is seen in those areas and your still losing coolant, you may have a blown headgasket and leaking coolant internal to the engine.

Just had a go-round with same problem in an 87 Cavalier. Had to take off radiator cap, add coolant, squeeze bottom radiator hose. After no more bubbles, add coolant, squeeze top radiator hose. Squeeze bottom again. Add coolant as needed. The air was because it was run low when the radiator cap gasket failed and coolant boiled out. Never got the overheat notice on digital dash or idiot light. Make sure you have a new radiator cap.

Hi there, Overheating can be caused by a few things.Thermostat,sticking Water pump impella worn or bearings,
clogged outer radiator core[dirt etc] loss of water or coolant,dirty inner radiator core,Head gasket leaking gasses into cooling system,binding brakes,semi clogged muffler or engine radiator hoses no good and gone soft and being sucked in ,etc etc

tray radiator flush and keep water hose in until water run out clear with engine runing

It seems that the "black bolt" is the bolt-shaped sheet metal around the fitting for your trans cooler line. If you are certain that your connection is good and the leak is coming from around that fitting then you will have to replace your radiator as the area around the fitting is probably cracked. Take a good close-up look, with an inspection mirror and a light, to try to determine from where the fluid is leaking.
Does your other line have an O-ring?

often times it is easier to pay someone. those GM V-6 engine blocks have cracks in addition to being warped. so merely replacing the merely the gaskets can accomplish nothing. perhaps some thought as to a rebuilt engine exchange may be in order.

water out of the exhaust can indicate discharge of built up moisture in the system, or perfect combustion. however coolant and coolant odor out the exhaust indicates what you think it indicates, that is coolant is leaving the cooling jacket and getting into the combustion chamber

YOU NEED BLEED COOLANT SYSTEM.CHECK COOLANT LEVEL IN RADIATOR.ADD MORE DEXCOOL UNTIL COOLANT LEVEL IS CLOSE TO RADIATOR SPOUT.CRANK ENGINE LET IDLE UNTIL TOP RADIATOR HOSE GET HOT.WATCH TEMPERATURE GAUGE.IF TEMPERATURE GAUGE START RISING TO HOT ZONE.TURN OFF ENGINE.LET COOL DOWN.USE LARGE RAG SLOWLY OPEN RADIATOR CAP A LITTLE AT A TIME UNTIL ALL PRESSURE RELIEVED.REMOVE RADIATOR CAP.ADD MORE COOLANT.CRANK CAR AGAIN LET IDLE UNTIL TOP RADIATOR GET HOT.KEEP EYE ON TEMP.GAUGE ALSO.WHEN TEMP.GAUGE STOP CLIMBING.YOUR COOLANT SYSTEM BLED.WHEN DONE LET CAR SET A WHILE CHECK COOLANT LEVEL.ALSO FIRST THING IN THE MORNING CHECK COOLANT LEVEL AGAIN.AND BESURE ADD COOLANT IN THE OVERFLOW JUG TO THE COLD MARK.DONT OVER FILL THE COOLANT RESERVOIR JUG.WORK SAFELY DONT GET SCALDED.

nbj

There should be a coolant sensor on the recovery tank probably bad

If there is oil in the coolant and nobody put it there it generally points to either a cracked block or blown head gasket. Is the car running at all?