Have been reading the forum with great interest. I have a 66 Chevelle SS 396. I have decoded the whole trim tag. The only thing I am stumped on is at the bottom for options. I have decoded the W 2LGSR but just below that is 5YL. The 5 is for option code 5. The Y is for deluxe seat belts. Does any one know what the "L" is for under option code 5?