I worked for a company that used OE data, it's impossible for them to, on a whim, "contact their sources". It takes weeks if not months usually to get an answer back for a question. It used to take us over a week to get a response from Ford on part number issues (and we were the part catalog for over 75% of their dealers!!). I'm not saying Aldata hasn't contacted them, if they have, you might not get an answer for a week or two...and they won't let you know anything in the mean time.and refused to respond when I asked if they could contact thier sources, I even offered to provide my vin to help.
Those ECMs will have to be taken somewhere, whether a dealer of a well-equipped shop, to be programmed with the vehicle's VIN. That will cost between $50 and $200.Before giving up on a new ECM, you may want to search alternate part number on the ECM. Its GM #12612397. You will see that this number is the SERV#.
When you search by this part number, you can see lots of choices. GMpartsdirect has it for $223. Rockauto has it for $260. Summit racing is only $184
It'll also have to be flashed with the correct VIN and OS for the car.Summit Racing, new, plug and play, overnight for just over $200. Need to do key relearn.
Overall good news, I think. Glad you are about to get it sorted.Just spoke with Summit again and asked specifically if I did need to have it flashed or not and was assured that as far as he knew it is "Plug and Play" as advertised which he described as "disconnect the battery, take it out of the box and install, reconnect the battery, go thru the key learning step start it and drive away with a big smile on my face".
Going to be mighty upset if I have to get towed to the dealer to get the ECM flashed.
We'll see, it will be here tomorrow or Saturday.