2023 Duramax L5P Allison TCM

[zr1driver]

Hi,

can someone tell me what TCM is used in 2023 Silverado L5P and if its supported by HPT?


Thanks Mike

[Bill@HPTuners]

Likely T87A, easiest way to check is to gather an infolog while connected to the vehicle, or simply look at the service sticker on the tcm(since it needs to be sent in for unlock either way).