I apologize if this has been covered but I've got a Sierra and I'm wondering if you have to bake it apart to remove the old projector? The silverado guys don't have to judging by the OP but it doesn't look like there's room to get at the screws for the stock projector.
Also once the old projectors out is it pretty easy to tell what to wire the new for projector shutter to? I didn't see any post about it.