2009 GMC ACADIA Equipment Problems

I BOUGHT THE ACADIA NEW IN 2009 . AT 15K MILES CD PLAYER TURNS ON AT NIGHT BY ITSELF AND RUNS BATTERY COMPLETELY DOWN HAD TO GO BUY A BATTERY CHARGER TO GET THE CAR STARTED YOU CAN'T MOVE THE CAR WHEN THE BATTERY IS DEAD, A RE PROGRAM FIXED THE CD PLAYER. 35-40K MILES DVD PLAYER WILL NOT WORK, RE PROGRAM DID NOT WORK, DEALER REPLACED DVD PLAYER. 40K MILES WATER PUMP WENT OUT, 40 K MILES WHEEL ALIGNMENT WENT OUT AND WORE THE FRONT TIRES TO THE CORD, NO MENTION OF COMPENSATION FOR TWO NEW TIRES AT A COST OF $500.00. 10K MILES FURTHER ANOTHER SET OF TIRES HAD TO BE REPLACED AT THE SAME COST, THIS IS AFTER DEALER WHEEL ALIGNMENT,5 K MILES MORE AND THE ALIGNMENT HAD TO PERFORMED AGAIN. JUST CHECKED AGAIN AT 5 K MILES MORE AND TIRES ARE STARTING TO FEATHER AGAIN. AT...

I OPENED MY TAILGAGE TODAY, 12/13/09, TO PUT SOME ITEMS INTO MY TRUNK. I LEANED IN TO GET THEM SITUATED & SECURE WHEN SUDDENLY THE LIFTGATE SLAMMED DOWN ON MY LOWER BACK, TRAPPING ME AGAINST THE INSIDE OF MY TRUNK. I WAS UNABLE TO LIFT THE GATE AND HAD TO SLITHER OUT ONTO THE GROUND, AT WHICH POINT THE LIFTGATE COMPLETELY CLOSED. I REOPENED THE LIFTGATE, UNSURE OF WHAT HAD HAPPENED, AND WOOSH! IT SLAMMED SHUT AGAIN. THE LIFTGATE WILL NOT STAY UP, AND CLEARLY THE SENSORS THAT ARE SUPPOSED TO DETECT OBJECTS IMPEDING IT'S CLOSURE ARE NOT WORKING. I HAVE TWO SMALL CHILDREN WHO OFTEN GET ITEMS OUT OF THE TRUNK - SUCH AS JACKETS OR UMBRELLAS - AND IF THIS HAD HAPPENED TO THEM, IT WOULD HAVE BEEN THEIR HEAD OR NECK THAT GOT CAUGHT. I BROUGHT THE CAR INTO LEHMER'S GMC IN CONCORD CA THIS MORNING AFTER...