Super, you can get the documentation from General Motors of Canada. I haven't personally done it, but I know there are members on here with Copos, etc that have done it, maybe they will pipe up and give you some contact info. Info will come from the head office in Oshawa ,Ontario.
This might help you get started, check out this thread:
https://www.yenko.net/ubbthreads/show...0/page/0#53995