The only way to make sure a vehicle is not stolen these days is to remove all 4 tires, and remove the engine. LOL.
On my 2013 F150 if I set the factory key alarm, as soon as the door is opened the alarm goes off about 10 seconds later. Can set the alarm and leave the windows down. Need the key in the ignition to turn it off. Same with the dealer installed command start. You can say I have 2 alarms that both work at the same time.
I believe they both disable the ignition when the alarms are activated until the key is put in. In other words, you need the chip key to start and turn the alarm off.
If you have a factory key with a lock button on it, try it out. Windows down and lock the doors with the key. Press the door unlock from inside and see if your alarm goes off.
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 Kim
Gonna get me a 16" perch.
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