Check the listing for details. Allison Duramax Silverado Diesel A50 T14 Trans Computer TCM Repair Service. Condition: Remanufactured. Listed at 449.00 USD. Repair service Please return to the listing description, If it says your purchasing a repair service then you must ship your part to us , We repair your part and return it to you , if there is a shipping cost then your pre paying for the return after it’s rebuilt . installation 99% of the time is plug and play , that 1% is if you have additional issues in the vehicle that need to be corrected. Core Return When purchasing one of our remanufactured or new parts most we require you return your faulty core , We generally offer a core refund which the amount is listed in that listing , In order to obtain a pre paid core return label please reach out to us via Ebay messaging to request it . Copyright © AUTO & TRUCK ELECTRONICS REBUILT TO LAST 2024. All Rights Reserved