Prom Chip ABDT 1987-1993 Chevy GMC 4.3L LB4 TBI TH400 M40 1227747 EPROM 16067065
BCC : ABDT. EPROM : 16067065. 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.