Back in 2007 all of the vehicles had the satellite button even if they weren't equipped with satellite radio. Since the screen is blank I would assume that means your GS doesn't have that option.Hello in my '07 GS350 when I push my sat button SiriusXM comes up on my screen but says need to activate but when I look up my ID # it comes up blank. Anyone else experience this? Does this mean I do not have the satellite module installed?