Results 1 to 2 of 2

Thread: 4l80e swap HELP!!!!

  1. #1

    4l80e swap HELP!!!!

    Is there anyone that can help me out!! I did the the 4l80 swap but i cant seem to find a os 12585950 so i can get the basic numbers for the 80 swap!!!
    ANYONE????

  2. #2
    Potential Tuner
    Join Date
    Jun 2020
    Posts
    6
    have you looked on the repository? look in express vans 1500/2500. if not get a different ECM or use the GM tech tool to update the OS.