It's possible if engine is flooding
Google 1996 Buick Regal Custom and see.
where is the drain plug for the radiator on a 1992 buick regal custom
The 2003 Buick Regal has a V6 engine.
The 2002 Buick Regal has a V6 engine.
The 2001 Buick Regal has a V6 engine.
The 2004 Buick Regal has a V6 engine.
The 2012 Buick Regal has an inline 4 engine.
The 2013 Buick Regal has an inline 4 engine.
The 2014 Buick Regal has an inline 4 engine.
The 2011 Buick Regal has an inline 4 engine.
A 1994 Buick Regal Custom uses 134a refrigerant, not freon.
The 2011 Buick Regal has a 2.4 L base engine size.
The 2001 Buick Regal has a 3.8 L base engine size.
The 2013 Buick Regal has a 2.4 L base engine size.
The 2003 Buick Regal has a 3.8 L base engine size.