Where does the overflow hose drain out.....the location

I do believe a small overflow drain hose should attach there.

yep connect to radiator.overflow line should run from overflow reservoir to the top of radiator where radiator cap located.radiator filler tube there is a 1/4 nipple where the overflow hose should go.

You should be able to take the small hose loose at the radiator filler neck and drain the overflow. Or use a syphon pump to pull coolant out of the tank.
The syphon hose would be the less messy way to go.

On this engine it isnt on the radiator hose it is on the hose that goes from the overflow bottle to the coolant housing. follow the tank to the block . you will need to drain the overflow bottle to remove this hose without making a mess.The thermostat is located in a hausing wher the hose bolts to the block.

For a 2001 Buick Regal GS 3.8 Liter, Supercharged engine:

First, let engine cool some. Second, locate small drainage hole at the bottom left/drivers side, of the radiator. From the bottom of this small drain hole, go straight back toward rear of radiator, then up about 1 1/2 to 2 inches up. (Have a drain pan or pail handy, to catch the old antifreeze.) You'll find a dark colored drain nut. Use a larger, correct sized socket ratchet wrench & loosen this fitting a turn or so, counter clockwise. Old antifreeze will begin to come out the bottom drain hole. The more you loosen the fitting, the faster the fluid flow out. I wouldn't remove the drain plug completely, or you'll loose control of the draining flow rate.

I just changed my anti-freeze just last week. I also changed the 2 large radiator hoses & smaller 2' overflow hose at the same time, as long as I was doing the job. They had never been changed before. I also used new hose clamps & a small packet of "radiator hose grease", from Autozone.. I drove the car up onto front car ramps to make it easier. I used safety jack stands for extra care. " You-Tube" shows some, "how to videos", that are helpful.

The old hose clamps are difficult to get to. (You'll need a few tools, some time & patience.) To get to the upper clamp, near the right/passenger side of the of the car, near the battery, I removed the outer serpentine belt & tension pully. I then removed the factory installed spring tension clamp, with the help of an adjustable battery pliers. The bottom of this hose wasn't too bad to get to. On the left/drivers side of car, remove black air intake box to access upper clamp. Remove the black metal brace bar, the will allow access to the air intake black box.

I also changed the small overflow 2 foot long hose & 2 clamps, that goes from radiator cap area, back to the overflow white plastic tank, close to passenger firewall. I removed the overflow tank to clean it out as well. I drained the fluid & changed the 3 hoses & clamps. I then placed all removed parts back where they belong, including white plastic overflow tank, tension pully & outer serpentine belt, air intake black box & metal diagonal brace, contacting air intake box. I flushed the system with some Prestone Radiator Cleaner & clean water. Start car & get up to temp., then run for about 10 minutes. Let cool, then drain again. I flushed my car at least 2-3 times after this, until the drain water ran clear.

The best price on a 5 year/150,000 mile anti freeze, came from Wal-Mart. I then mixed about 50/50 with Distilled water, as suggested on the bottle. All went well & no leaks! I took my time and did a thorough job. Good luck!

Anything on the radiator is difficult to get to. I usually remove the small hose that goes from the overflow bottle into the lower radiator hose to drain the cooling system. If you look at the passanger side of the car in front of the wheel down at the bottom you will see where the lower rad hose goes into the radiator there is a tee where the small hose from the overflow tank comes in, remove the pinch clamp and pull the hose off, have a big pan ready because it will come out fast! Good luck. P.S. Please dont do this with the engine hot!

Should be a drain **** at the bottom of the radiator that unscrews out. It looks like a wing nut has been welded to a bolt on the end of it. Another way to do this is just pull off the bottom hose.

No there is probably a plastic sheild underneith the radiator remove and then you will see the drain plug.

Drain fluid and despose of at an autoparts supplier.Do not drain on to ground,do not open cap hot.Dissconnect hoses and any brackets going to the radiator be careful fluid is still in the hoses.You then pull up on the radiator and take it out be sure to remove electric fan or plastic fan shroud.Disconnect the overflow hose located toward the radiator cap or left side of radiator.Make sure all the brackets top to bottom off the radiator are unbolted.Good luck!

That hose is the drain hose for the a/c. When condensation forms from running the a/c it drains out through the black hose you are refering too.If it doesn't drain out it will eventually overflow inside the car and get your carpet wet.