Is the starter clicking, or trying to crank over?? If the engine sounds like it is trying to turn, it'll be the security system. If it is making clicking noises, it is a battery problem/connection issue.
Also, if the OEM system went on and you don't have the "Properly Encoded Key", then you'll need to actually tow it to the dealership. These keys run about $60 + $$ the cost of the service department encoding it to your actual vehicle.
---------- Post added at 05:35 PM ---------- Previous post was at 05:33 PM ----------
Originally Posted by 1slosix
The security system is on lock down....this would be the OEM system. If I recall it'll need to be unlocked by the dealer but don't quote me on it.
Yes, if the OEM goes into lock down and you don't have the encoded key, only the dealership can unlock it. Not even the automotive locksmiths can unlock it. FYI...