Preowned vehicle, Starter works very well,(hold both buttons down for -under two sec.)I have accidentally ( eep!) turned on the security system 4 times. (when it is on, car will not start, even with key) , can deactivate security feature by pressing # 1 button.BUT have no idea how to turn it on on purpose!Have tried just about every combination of buttons I can think of!I think this was installed at the GM factory because we have an idiot light on dash that reads ‘security‘ when the system is on. But I think it has been reprogrammed to become a remote starter as well. And naturally no manual or such came with the car.We always lock doors manually, using the power locks, could that be related in anyway???Happy New Year by the way. :)
I had this problem with the 300esp, after pushing 100's of combinations I went to a local guy who hooked up to the brain and he was able to reprogram the brain and add a new key fob for 49bux. ALOT easier than playin the guessing game. and not too expensive either. I know on the 300esp you can accidentally change the settings by turning on the key and operating the valet switch a certain number sequence. After I guessed and played around with a few sequences I thought it might be.I only made the problem worse then went to the local guy. good luck
