Google 1996 Buick Regal Custom and see.
the PCV valve is located on the valve cover of a 1991 Regal Custom. It is plugged in and can be easily changed.
where is the drain plug for the radiator on a 1992 buick regal custom
On a 1993 buick regal it is on the side of the radiator.
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.
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.
On the top of the starter where wires connect
It's possible if engine is flooding
The 2013 Buick Regal has an inline 4 engine.