I am planning on returning my seats in my 88 IROC convertible to their factory look. My RPO codes are :
19C Trim Combination, cloth, black
YR1 Seat, FRT Custom
AR9 Seat, Frt Bkt, European Style, Pass A Recl
AM9 Seat, RR, Split, Back, Fldg
Ag9 Adjuster, Seat, Power, 6 way

If anyone has pictures of what these combinations look like for 1988 please post. Exterior is black and the top is black if that helps. Thanks.

19C is black and silver velour and Hawk's (a site sponsor) sells a nice set. My 89 is almost the same as your 88 - less custom front and power (power is just the plastic trim piece that holds the switch and connector as far as upholstery is concerned).

Here's my re-cover job if it helps...

https://www.thirdgen.org/forums/inte...ing-seats.html