reprogramming with GM Tech 2

I have a 2000 Blazer that did not come with keyless entry. I went to the Junk yard and got the correct receiver. I now need to program the BCM to accecpt the receiver. I have a Tech 2 but don't know how to flash the code. Any help would be greatly appreciated.

alcjack

This is something I would LOVE to do too. I was told it can't be done, but I still don't really buy that. If someone on here knows how to accomplish this, or if you yourself gets this figured out, please post back, I'd love to get factory keyless on my truck