I know that for some reason you cannot have the shaker 1000 and nav from the factory on the gt500. Sorry to start your day like that.
Isn't NAV in a Shelby 'bout like a screen door on a submarine? JK - I don't have NAV in mine but we do have it in our Sequoia. Less than a year old and already it is out of date - my iPhone seems to be better for me but my better half couldn't live without it, (I don't think she realizes her iphone has it but we'll just keep that to ourselves!) Good luck - keep us posted on what you find.
