Dome light blinks and audio ticks like turn signal, when doors open/close.?

1998 Chevy Blazer 4x4 4 Door, my dome lightand floor lights blink several times like my turn signal would with audible sound. Not sure why, any recommendations? It stops after about 15 seconds, happens every time doors are opened. Won't do it if my "Dome over ride" switch is pushed in. Only does it when switch is in "out" position. I would like to have interior lights at night without the blinking lol

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