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<blockquote data-quote="Slody4Futbol" data-source="post: 1395527" data-attributes="member: 551839">as far as the factory alarm, it says &quot;factory alarm disarm,&quot; is there usually a wire that comes off the remote start that will disarm the factory alarm when the remote start is activated?as far as your ignition harness wiring...12v = red... and i think red/white or maybe both are red...ignition = pink2nd ignition = whiteaccessory = orangestarter = yellowthose should be all you need... almost every alarm i&#039;ve dealt with has 2 ignition wires... if you don&#039;t then you need to see if a wire on the brain is a -200MA 2nd ignition or accessory output... you&#039;ll use that wire to activate a relay and activate the other wirekeysense usually goes to ground when the key is inserted into the ignitionbut even if it goes to 12v you can check it... meter your suspected wire... insert key... and see if hte meter switches from 12v to 0... or from 0 to 12v...your best bet would be get a DEI 451M from an installer... i know i have like 5 in my box at work... wire the small blue and green to your -lock &amp;amp; unlock output from the alarm... send red to 12v... then on the bigger wires purple goes to 12v or ground... depending on if your locks are 12v or ground... and you use your blue &amp;amp; green wires for your lock &amp;amp; unlock and insert the resistor as needed... which on the impala is a white wire?most alarms have a factory alarm disarm wire on them... if not lemme know and i&#039;ll figure something else out...this car is not as hard as you may think it is... i TRY to catch as many wires away from the bcm as possible... i just hate stripping and soldering way back against the firewall where that BCM is... don&#039;t unpin anything lol...you can usually get doorlocks in the sill panels where the main harness runs in the car... you will more than likely have to diode isolate all the door triggers at the BCM...</blockquote>

[QUOTE="Slody4Futbol, post: 1395527, member: 551839"] as far as the factory alarm, it says "factory alarm disarm," is there usually a wire that comes off the remote start that will disarm the factory alarm when the remote start is activated? as far as your ignition harness wiring... 12v = red... and i think red/white or maybe both are red... ignition = pink 2nd ignition = white accessory = orange starter = yellow those should be all you need... almost every alarm i've dealt with has 2 ignition wires... if you don't then you need to see if a wire on the brain is a -200MA 2nd ignition or accessory output... you'll use that wire to activate a relay and activate the other wire keysense usually goes to ground when the key is inserted into the ignition but even if it goes to 12v you can check it... meter your suspected wire... insert key... and see if hte meter switches from 12v to 0... or from 0 to 12v... your best bet would be get a DEI 451M from an installer... i know i have like 5 in my box at work... wire the small blue and green to your -lock & unlock output from the alarm... send red to 12v... then on the bigger wires purple goes to 12v or ground... depending on if your locks are 12v or ground... and you use your blue & green wires for your lock & unlock and insert the resistor as needed... which on the impala is a white wire? most alarms have a factory alarm disarm wire on them... if not lemme know and i'll figure something else out... this car is not as hard as you may think it is... i TRY to catch as many wires away from the bcm as possible... i just hate stripping and soldering way back against the firewall where that BCM is... don't unpin anything lol... you can usually get doorlocks in the sill panels where the main harness runs in the car... you will more than likely have to diode isolate all the door triggers at the BCM... [/QUOTE]

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