iSimple Tranzit IS77-Antenna Adapter?
I recently purchased the iSimple Tranzit IS77 for my 2006 Pontiac G6 and was wondering if I need an antenna adapter. The instruction booklet says that some cars need them, and I can't seem to find if my car is one of the cars that has to have an adapter. If it does need one, what is a good type to buy? The person who is installing it wants to work on it this weekend, so it would be better if I can run to a Best Buy or something like that so I can pick it up rather than ordering it online.