2 Answers

Sorry, that is an incorrect VIN#

It should be 13 digits

The model year is the tenth digit

 If the "M" is the correct tenth digit, it is a 1999

I mis-typed newer VIN's are 17 digits. It should have been a 1991

A 1980

B 1981  

C 1982

D 1983

E 1984

F 1985

G 1986

H 1987

J 1988

K 1989 

L 1999

M 1991

N 1992 etc., to  Y  2000       

Then Numbers from ! in 2000 etc to  9 in 2009  

In  2010  bact to the letter "A"

I had to google the Oldsmoble Cutlass. I believ the info came up on a Mustang or Firebird site. It wasn't the right car but it had the VIN reading info I needed. Thank you for your assistance however, I woek on a variety of American Autos her in Germany and to make them Legal here they require exact manufacturer data no matter how old or new.