radiator

im looking to flush my radiator on my 99 gp gt. can any one give me a walkthrough?

To do it right you’ll have to install a flush T in the heater return hose. Prestone makes a flush & fill kit available at any autoparts store or Walmart.
1. With engine cool, remove radiator cap and drain the radiator.
a. Turn drain plug (lower left engine-side of radiator) counter clockwise (may require a little force if it's not been opened in awhile--be careful because it's plastic). Plug will extend slightly as it loosens. Be sure to have a container in-place to collect the antifreeze.
2. Let all the antifreeze drain into a container.
3. Remove, drain and clean the antifreeze overflow bottle. Reinstall bottle.
4. Hook up a garden hose to the flush T and turn water on (not too high or you can damage seals/gaskets with the pressure). When water starts to run from the drain plug, start the engine and turn the heater on (make sure you leave the water running during this process).
5. When water runs clear (about 5 minutes), turn off car, then turn off water, and remove hose from T and cap it. Let remaining water run from drain plug.
6. Close radiator drain plug and fill radiator with a 50-50 mix of antifreeze/water (or buy premixed).
7. Start vehicle and bring to operating temperature. Add additional mixture as necessary until full.
8. Reinstall radiator cap.
9. Release any trapped air in cooling system by turning the plug on the top of the thermostat housing (be careful not to burn yourself). When only coolant (no air) flows from the plug, close it. You may have to repeat this several times to get all of the trapped air.
10. Add additional coolant as necessary. Also fill overflow bottle to recommended level. Be careful not to open radiator cap if hot. You may have to do this several times.
11. Check for leaks.
12. Recycle old antifreeze. This stuff is toxic.

thanks stlwagon appreciate it

a. Turn drain plug (lower left engine-side of radiator) counter clockwise (may require a little force if it's not been opened in awhile--be careful because it's plastic). Plug will extend slightly as it loosens. Be sure to have a container in-place to collect the antifreeze.
2. Let all the antifreeze drain into a container.

I am thinking draining the coolant on my wife's 01 GT but can't seem to find the drain plug.

1. Left engine-side of Radiator is the side in front of AC pulley, right?
2. Do I need to remove the bottom panel (beneath the radiator) to access to drain plug?
3. Is the drain oriented to flow downward or sideway?

I remember when I did my Cavalier and the drain is oriented to flow sideway and coolant was on the cross-beam and made a mess inside my garage...

Drain plug is on the drivers side. Just rotate the plug counterclockwise while gently pulling outward. Antifreeze will drain down through hole in radiator mount. Just place a bucket underneath. You should be able to reach from underneath without removing the plastic molding. But it's only 5 or 6 bolts (I think) if you have to take it off.