on the oil pan
the PCV valve is located on the valve cover of a 1991 Regal Custom. It is plugged in and can be easily changed.
Google 1996 Buick Regal Custom and see.
On a 1993 buick regal it is on the side of the radiator.
where is the drain plug for the radiator on a 1992 buick regal custom
The PCV valve on a 1994 Regal Custom should be located on top of the valve cover. It is a plug in type and is easily changed.
On the top of the starter where wires connect
It's possible if engine is flooding
The 2001 Buick Regal has a V6 engine.
The 2004 Buick Regal has a V6 engine.
The 2003 Buick Regal has a V6 engine.
The 2002 Buick Regal has a V6 engine.
Freon valve on my 1989 Buick Regal Custom 3.1 V-6 located on driver side under the area of battery tray. Hope this helps!