2000 CHEVROLET VAN Wheelslugsnutsboltsstuds Problems

RETURNED TO POLLARDS CHEV. FOR OIL LEAD 3 TIMES, ONLY SLOW IT DOWN. AFTER DRIVING VEHICLE ABOUT 20 MILES AND/OR WARM UP I WOULD STOP AT RED LIGHT AND THE RPM'S WOULD SURGE 2 TO 4 THOUSAND. LELK INSIDE CAB ABOVE BRAKE PEDAL. ON SEPTEMBER 27,2000 SLOW DOWN FOR A DIP, LEFT FRONT MADE A SNAPPING NOISE AND DROPPED A LITTLE. DROVE ON TO A CURVE AND STEERING WOULDN'T TURN. VEHICLE WENT INTO DITCH, FRONT LEFT WHEEL, LUG NUTS, STUDS, AND PART OF THE WHEEL WHERE THE STUDS SCREW INTO WAS BROKEN OFF AND UNDER THE TRUCK. THERE WAS NO BRAKE PRESSURE AT ALL, AND SPOTS OF FLUID ON THE ROAD BEHIND THE TRUCK. CHEVROLET CUSTOMER SERVICE HAS GIVEN ME THE SHAFT, AND SAID THERE WAS NOTHING WRONG WITH TRUCK AND TO TURN IT INTO MY INSURANCE. THEY DON'T HONOR THE 3 YEAR, 36000 MILE WARRANTY AND DON'T EVEN US...