2005 CADILLAC ESCALADE EXT Equipment Problems

I HAVE A 2005 CADILLAC ESCALADE EXT, I WAS IN LAS VEGAS AND PARKED MY VEHICLE IN THE FIRST PARKING SPOT , WHICH WAS THE HANDICAP PARKING IN FRONT OF STORE . I WAS IN THERE FOR NO MORE THAN 20 MINUTES AND MY VEHICLE WAS STOLEN , I THE CALLED THE POLICE WHICH GAVE ME THE NUMBER TO ONSTAR, THEN ONSTAR TOLD ME THEY SENT A SIGNAL TO THE TRUCK, AND THE TIME FRAME WAS NO MORE THAN 10 MINUTES OF 8:50 . THE OUTCOME WAS THAT ONSTAR DID NOT LOCATE THE VEHICLE IT WAS LOCATED BY THE POLICE 6 DAYS LATER. WHEN I WENT TO GO TO LOOK AT THE TRUCK AT THE TOW YARD I DISCOVERED THAT THE ONSTAR ANTENNA WAS BEHIND THE REAR VIEW MIRROR , SO THE PERSON WHO IS STEALING YOUR VEHICLE JUST HAS TO PULL A PLUG OUT OF REAR VIEW MIRROR AND...