2000 s1o blazer

Looking for info on how to program bcm to use keyless entry module need instructions on either how to reflash the bcm or how to unlock the feature key;less entry what ever is needed I can get I have access to a tech 1 and 2 scanner and any gm specific tool The vehicle has power door locks power windows just missing keyless entry purchased module now I need to know how to get it to function Dealer said if I got instructions they would do it free for me Please help