POWER TRANSFER CASE 4 WD, AGAIN TODAY 2/5/03 MY CHEVY TRAILBLAZERS 4WD LOCKED UP WITH KNOB IN 2WD AND THE LIGHTS ARE ON BOTH 4WH-4WL STOPPED US ABRUPTLY SKIDDING AND THROWING US FORWARD, I HAD THIS CAR IN THE SHOP 1/31/03 FOR THE SAME PROBLEM, AND THEY TOLD ME THEY COULD FIND NOTHING WRONG WITH IT. I TOLD THE DEALER AND GMAC THAT I DONOT WANT THE CAR BACK THIS IS THE 4TH TIME THIS HAS HAPPENED AND ME AND MY FAMILLY ARE VERY AFFRAID WHEN DRIVING THIS CAR THAT IT IS DANGEROUS AND COULD INJURE US. MAYBE IT WILL TAKE SOMEONE GETTING HURT OR KILLED BEFORE THEY WILL BY BACK THIS CAR. I AM IN FEAR AT ALL TIMES WHEN I DRIVE IT BUT I HAVE NO OTHER VEHICLE AND CQANT AFFORD TO BUY ANOTHER WITH THIS PAYMENT. GMAC PLEASE HELP