Spark Plug is a direct fit for the following:

1997-2004 Buick Regal
3.8L Engines
1993 Cadillac 60 Special
1991-1995 Cadillac DeVille
1992-1993 Cadillac Eldorado
1991-1992 Cadillac Fleetwood
1992-1993 Cadillac Seville
4.9L Engines

Genuine GM Part Number: 19300875