I got the factory remote setup i took from a g6 and have it in my 04, the door locks and everything works with extended range, but i still have to get an 05 bcm with the same options as mine + remote start so that the remote starting will be supported. As for the hood switch for the factory setup a resister will make it think there is one, forget the exact value but i will let you know as soon as i can find a bcm to try it.