Fiero/GM keys with the black plastic logo GM logo ends were the OEM parts and coded A, B.C.D & E.
For instance the 87 and 88 Fiero will take a C ignition blank and a D door/trunk lock blank.
You can buy a exact blank set (ign + door locks) for $5.77 w free shipping on ebay from bbblanks. The Fiero Store also stock them
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "