Problem with 2001 Chevy Suburban power door lock/unlock switch?

A C

New member
I bought a 2001 Suburban 2 weeks ago from a used car dealer. They didn't have the remote thing so I just use the key to unlock. Today I unlocked the hatchback door with the key and the alarm went off when I opened it. I just unlocked the front driver door and the alarm went off but now when I use the lock/unlock switch on the door it only locks/unlocks the driver door not the other doors even if I push it twice. I don't know if it has anything to do with the alarm going off earlier or something else. Anyone have any ideas?? Thanks!
 
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