westers has a stand alone ecm. No bcm, no passlock. In theory five wire hookup like others offer for the v8's. Currently he does not have the automatic operational but hopes to have it by the end of the month. I hasve been waiting for someone to do this for two years. There are more than a few people that will sell a computer to run the engine. Theirs don't run the automatic or the fly by wire throttle and if you have a problem with it, you had better have your laptop with you. Westers uses the facrory ecm andc you should be able to plug it into a gm diagnostic machine to see what is wrong with the engine. Speartech can do a harness for you. At this point I am not sure Westers will do it for you.