Why does the alarm go off every few minutes when you lock the doors on a 1999 cadillac escalade?

I cannot lock the doors on my 1999 Cadillac Escalade because the alarm will go off for minutes at a time then stop for a few minutes then go off again and so on until I unlock the doors. Any idea what would cause this?|||GM didn't install factory alarms in 99 so you need to determine if it's an alarm or just keyless entry with a panic mode. If it's just keyless then a common problem could be your battery output is too low, the car battery. I know it sounds impossible but believe me, it has caused the horn to go off in the middle of the night or at random times with many of my customers. If it's an aftermarket system, you should be able to disable it by locating your valet switch, it should be under the dash, close to the column and it will be either a button or a toggle switch, turn the key one time to the on position then back then push the button or flip the toggle in the opposite direction. See if that works, if so then you'll now its the alarm and not the charging system. Good luck|||It sounds like a short in the wiring. It may not be the original alarm. Call the dealership. If it a defect they will help. If it is a custom or after market system you will have to pay for repairs.