You will need to write down the model number and letters from your model and serial tag. 

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The date code is in the letter on your model number.
Always use the last part of the model number.

Example model numbers: LRS5555BW1= 1994  or  SF555PEYW1= 1992  or  LE5555XPW1= 1985  or  ET55PKXXW0= 1991  or  EV555CXKW0 = 1982

K = 1982 or 2001   L = 1983 or 2002   M = 1984 or 2003   P = 1985 or 2004   R = 1986 or 2005   S = 1987 or 2006   T = 1988 or 2007   V = 1989 or 2008   W = 1990 or 2009   X = 1991 or 2010   Y = 1992 or 2011   A = 1993 or 2012   B = 1994 or 2013   D = 1995 or 2014   E = 1996 or 2015   F = 1997 or 2016   G = 1998 or 2017   H = 1999 or 2018   J = 2000 or 2019