Originally Posted by
oakrdrs187
The 3 button is for the cars with factory alarms. One way to find out is at night, as you exit your car lock your doors with the button and close the door, then peek at your cluster and within a few seconda a green light with the symbol of a car and in the center of the car is a key, if that lights up it means the factory alarm has been activated and within a minute the light will turn off. If this is the case then get the 3 button. If nothing lights up on the dash then get the 2 button.
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