D = 1983
07A = July, 1st week scheduled build week in 1983.
3= Olds
GR= Cutlass Supreme
47= 2 door notchback
M= Lansing, MI build plant
646412= Fisher body internal number. Has nothing to do with VIN.
48L/48U = lower and upper body color - Dark Grayfern metallic (dark gray green color, I always thought it was strange)
42A = light grayfern accent pinstriping.
42C = cloth medium grayfern interior
AR9 = reclining bucket seats
CC1= T-tops
BX2= Lower wide body molding
NB1= Closed loop emissions system
6147- never did find out what these numbers were at the bottom of the tag. Maybe something else with Fisher stuff. Again, has nothing to do with VIN.
In 1983, they didn't usually have "Y78" (Calais) RPO on the body tag. But once enacted, the Y78 package changed the VIN to an AK47 vs GR47. This is why you still show a "GR47" supreme 2 door body style on the body tag vs. AK47. Also, the dash, steering column/wheel are probably a darker shade of the same color than the carpet and seats and junk. They used a lot of "2-tone" lighter/darker color mixes in the early 80s on these cars. I know the sand gray interiors used a really dark gray on dash and column bits.