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2007 gmc envoy slt
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Discussion Starter · #1 ·
Hello everyone, this is my first post on here.

I tried searching for this on this site, and google. I am getting an aftermarket alarm because my Envoy didn't come with one (I tested it by rolling down the driver's window, getting out, locking with the FOB and waiting a minute. I reached in, unlocked it maually and used the outside handle to open the door).

I was wondering if anyone knows where the lock/unlock wires are that the FOB uses, so it will retain the lighting. Esentially using the wires like I was using the factory FOB.

Thanks in advance for any help.
 

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2004 gmc
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26,181 Posts
The factory fob's receiver is in the liftgate, and it doesn't have a dedicated wire to the door locks. It sends a serial Class II data message the the body control module (BCM) under the rear seat that handles the light flashing and door unlocking, etc.

Aftermarket alarms have to connect to this data bus.
 
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