Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
The radio needs to be SPS programmed for the new VIN as a passthrough via Tech 2, or TIS2WEB on the GM SPS platform and an MDI.
At the moment it would have a VIN mismatch.
The radio should come out lock mode at the end of programming.
Do you have Tech2Win (Tech2 for Windows) program on a computer?
If you don't have that, might be better to sublet the car to a GM dealer and get them to do it for you.
They are both good questions.
I would say that generally the Tech2Win program is only available to GM dealers.
I don't think even your Snap-On would have the capability.
The first page here has some info.
I've never googled Tech2Win myself, because I have it at work.
But there is other stuff out there too:
If you search for Tech2 on ebay, that may be an option as well.
You would still need a RS232 lead and a dongle for programming.
Hope this might help you.
Do you need any further help?
I hope my advice has been of assistance to you.