Making a long story short...

I set the alarm, and open the doors from inside and the alarm doesn't sound.

This isn't normal. What could be wrong?

 

Lol. Holy fakeness. I just tried it and mine's the same way.

 

...it's supposed to work though.

Mine used to, IDK what changed.

 

Mine worked...Confused now. Good luck, dudes!

 

Try rolling a window down getting out of the car, setting alarm watch the alarm indicator be steady then start blinking at this time open the door from the inside it should work it takes a few seconds on maybe a minute or two to activate, the factory alarm that is.