Thank you for reaching out to us. For the repair, we only require the TCM. The turnaround time for the Allison A50 TCM is typically between 3 to 5 business days. If you would like to place an order, kindly click on the link provided below:
https://www.upfix.com/product/chevrolet-3500-2009-2015-allison-duramax-gm-tcm-transmission-control-module-repair/