Prom Chip AUXH 1991 S10 2.5L Manual Transmission Fits 1227165 # 16153769
BCC : AUXH. EPROM # : 16153769. When replacing your PROM you must match the 4 letter code on your PROM from your vehicle. Do not replace a PROM with a non matching unit. This is for one PROM only and doesn’t include the engine computer.