This is true, by over the years some electronics changed. Like.. the injecting system, wasn't it MFI 87-89, then SFI 90-91? I believe there were changes between the years, like cosmetically 90/91 has 'sportier' mirrors, and only a two finned grille. All I remember is that a while ago someone mentioned [or I read somewhere] that 87 is different from 88-89 and 88-89 is different from 90-91. There were little changes made in the electrical and mechanical. I also believe in the transmission, that there were upgrades, or something along those lines. Am I crazy?
nomader: This is normal for a code being present. The ECU has not gone through all it'* diagnostic testing [the engine needs to be running for this to happen], this is why when you don't start the car, and just turn the ignition on, the SES light comes on, but no codes are present [just a code 12, saying everything is functioning properly]. What is the code number you see for the TCC issue?
'89 SSE - GX3 -190k, 155k on body - Back for another ride.