1997 cadillac deville lost entrance key and keyless entry broke. need to get alarm off or atleast horn off.?

Question

I need to disconnect the alarm or horn this is so annoying and embarrassing

Answer 1

If you can, open the hood and disconnect the alarm. Or call locksmith  to make a key.

Answer 2

the only way is to lock and unlock drivers door from outside but since you lost the key you will need to pull out the door lock and have one made or if you go to dealer with proof of ownership and id they will cut a copy from the serial number