so i have completed the swap and all wiring necessary also changed over and can communicate with vehicle. Truck started out as a 2015 silverado with a 4.3. I have swapped in a DOD deleted 5.3 from a 2016 with harness and ecm and matching transmission. Do i need to first match the VIN of the ecm and tcm to the truck, or just delete vats and fire it up?