I received the GPS antenna (ACDelco 15821030) and located where the antenna would have been installed from the factory and the pig tail coming from the antenna is 12" which is way too short for a direct connection to the nav unit (36"). I assume the pig tail plugs into the harness somewhere near the mounting location but I don't see a plug nor do I see a plug coming out of the harness near the nav mounting location. Can someone tell me if I'm on the right track or if a factory nav unit install in a non-factory nav installed Grand Prix is just too hard?
