It is on the lower right of the radiator. Sometime it is esier to remove the lower rad hose. Drivers side. You use a 3/4 wrench to lossen it and when you tighten it, don't turn very hard or you'll break the plastic plug.
Open the petcock or remove the lower radiator hose from the radiator.
The radiator petcock drain on a 1999 Pontiac Bonneville is on the bottom of the radiator. Look for a small black plug that looks like the plug found on a thermos or cooler.
Look at the bottom or rear of radiator
On the passenger side of the Radiator. At the bottom near the lower radiator hose connection.
There isn't one. You will have to loosen the lower radiator hose to drain the radiator.
yes.
No, different electronics/sensors.
pull the petcock on the bottom of the radiator. it's either on the feft or the right bottom
Remove plug or open petcock at the bottom or rear of the radiator or remove the lower radiator hose
I just ran into this problem. The petcock is plastic and has a metal pin protruding thru the side. This pin rides in a "track" and locks the petcock into place when you put it back in. I broke the pin removing the petcock and had to remove the radiator to repair it. You may be able to do this with the radiator in place. See if you can feel the track and if you replace the pin, you will feel it lock into place when you reinstall the petcock. The pin can only protrude on one side of the petcock so that the petcock will seat correctly. Good luck.
It should be a direct swap.
You will find that it is located on the bottom of the radiator. If you do not find a drain Petcock on the bottom of the radiator you must remove the lower radiator hose in order to drain the radiator.