door unlock sound factory alarm

Installed a remote start on a 2000 GMC Jimmy  awhile ago and sometimes the horn will honk when the doors are unlocked with the remote.

Looked at the wiring for this vehicle and it doesn't show a alarm disarm wire for this vehicle, but it does for the s-10 blazer (basicly the same thing). Has anyone had this problem or have some advice to give about this?

Thanks, John

Check the BCM for the disarm wire. Light green i think it is? Pretty sure the BCM is to the right of the gas pedal under the center stack area. I hate those dashes! So many 7mm screws! lol

Use the - unlock wire from the keyless unit isolated from any other circuit it is attached to with relays or diodes. Don't want your door lock switch disarming the factory alarm or that would defeat the purpose.

I'll have to get the car back and go over how it's installed. I don't think I hooked up the disarm wire but this wouldn't explain why it only sets off the alarm periodacally when unlocking the doors.

So I should have used diodes on the unlock / lock wires. I'm sure I didn't do that. I'll post back what I find.

Thanks for the help

I had asked if they were using the factory keyfob to lock the doors and they said only used the starter remote, unsure about the manual locks I'll ask.

Thanks