I am installing an aftermarket radio in my 2007 New body style Silverado, I am trying to hook up my steering wheel controls by using the aftermarket PAC SWI-ALP and I need to hook up one of the wires on the aftermarket peice to a wire on the factory steering wheel control, according to the directions which only go to 2006, says to tap into pin B31 (lt.green) would it be the same for a 2007 nbs silvy? Thanks in advance...