98 Suburban alarm problem

My alarm keeps going off no matter what. I found 2 fuses blown, 30 and a 50 amp replaced them but the alarm is still going off, only way to fix is to disconnect the batterie. Or turn the key on and hook the batterie up, then you can start it.. Iv checked the dash fuses and the fuses under the hood on the drivers side.. If there is any other place to check for fuses blown please let me know.

What alarm? Is this OEM or aftermarket?