I have a 2020 GMC L84/MQE 8spd here with the T93 in it. There is an older thread about possibly using a T87a in this application. Has that ever been sorted out? Happy to pay for a compatible VIN or OS numbers that will play with the current PRNDL.
I'm stuck in that "nine line bind" with a customer that makes their lack of planning my emergency situation FREQUENTLY. Good thing is they pay dearly for it.