Results 1 to 2 of 2

Thread: Is the new 8 speed unlock for the 2019-2020 trucks T87A or just the 17 and below???

  1. #1

    Is the new 8 speed unlock for the 2019-2020 trucks T87A or just the 17 and below???

    Just like the title states!!! I?m getting mixed answers or reading incorrectly! Does the new unlock service work on the new body style 19 and 20 sierras with 8 speed T87A or just the 17 and below.

    I severely need to tune my 19 Sierra TCM.

  2. #2
    Advanced Tuner
    Join Date
    Aug 2016
    Posts
    386
    The new Silverado / Sierra uses a T93, not a T87A