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i noticed something today... i turned the key on and all teh lights on the dash light up like they usually do but i saw in the bottom left info panel that there was a security light.... did the 91 devilles happen to come with a security system and i not know about it??
 

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a security/keylees entry system was ptional.... the light is also there to make sure the anti-theft device built into the key is there and working too....the pass-key II was standard, there is a diode int he key (the little black/sivler box) and if somewith with a key that dosn't have that chip or the wrong resistance, despite the actual cut of the key trys it in the car, the fuel pump and starter are shut down for 1min, if they try another key that is wrong, it is shut down for 3min.....prevents peopel from trying differnt keys.....
 
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