Is there a drain plug on a 2005 Buick century
where is the drain plug for the radiator on a 1992 buick regal custom
Transmission drain plug 2011 drain plug
You can find the 1991 Buick Skylark radiator drain plug on the bottom of the radiator. The radiator drain plug will be in the center of the radiator bottom.
If you can't find drain plug, just disconnect lower radiator hose.
Bottom of the oil pan.
on the bottom of the engine's oil pan
Look at the bottom or rear of the radiator
On the rear or side of the oil pan
15mm.
There is no drain plug for air conditioning. All is done through the service ports with a recovery / charging station machine. Some gm compressors have a crank case plug, but that is not a drain plug; it is to add oil when servicing the compressor.
THERE SHOULD BE A PLUG ON THE BOTTOM OF THE RAD