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.
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.
The new Silverado / Sierra uses a T93, not a T87A