Can anyone confirm for sure if replacing the OEM head unit with an aftermarket one will disable my OEM navigation system? Crutchfield has a note under installation details that mentions this. Can someone confim for sure if this is true.
Hmm...I've got an OEM Nav unit on my 07 too. I've contacted Crutchfield directly and they mentioned that it would disable the OEM Nav unit voice directions. They suggested an aftermarket unit w/ Nav as an alternative, ultimately disabling the use of OEM Nav unit.
