I WAS ON THE TRIMBLE ROAD ON RAMP IN SAN JOSE, CA MERGING ONTO FREEWAY 101 AT APPROXIMATELY 1235 PM PST AND 793 FEET FROM THE DE LA CRUZ/TRIMBLE ROAD TRAFFIC LIGHT. TRAFFIC CONDITIONS WERE LIGHT, WEATHER WAS DRY AND ROAD CONDITIONS WERE EXCELLENT. THE ON RAMP IS APPROXIMATELY AN 1/4TH OF A MILE LONG. I PULLED INTO THE COMMUTER LANE TO PASS 2 VEHICLES THAT WERE TRAVELING AT APPROXIMATELY 40-45 MPH. I PASSED THE FIRST VEHICLE AND WAS ABOUT TO PASS THE SECOND WHEN MY 2005 CORVETTE STEERED TO THE RIGHT CAUSING THE RIGHT FRONT OF MY CAR TO IMPACT A 1984 4 DOOR SEDAN TOYOTA ON THE LEFT REAR QUARTER PANEL/BUMPER, BEHIND THE LEFT REAR WHEEL. THE TOYOTA STARTED TO SLIDE RIGHT AND WHEN THE WHEELS WENT FROM ASPHALT TO DIRT CAUSED THE TOYOTA TO ROLL OVER COMING TO REST ON ITS' WHEELS IN THE MEDIAN ON THE LEFT SIDE OF THE ON RAMP. MY CAR CAME TO REST IN THE DIRT ON THE RIGHT SIDE OF THE ROAD APPROXIMATELY HALF WAY ON THE ON RAMP. THE DRIVER OF THE TOYOTA HAD A CUT ON ONE OF HER FINGERS AND WAS EXTREMELY EMOTIONAL. I WAS NOT INJURED. MY CAR IS EQUIPPED WITH ON-STAR WHICH DID NOT ACTIVATE DUE TO THE CRASH. NONE OF THE AIR BAGS DEPLOYED IN MY CAR. ON OCTOBER 4TH, 2007 I TOOK MY CAR TO COURTESY CHEVROLET IN SAN JOSE, CA; I TOLD THE SERVICE REP THAT I HAD RECEIVED 2 NOTICES IN THE DRIVER INFORMATION CENTER DISPLAY TO SERVICE THE "ACTIVE HANDLING SYSTEM SOON" AND THAT I HAD IMPACTED A CURB. THE SERVICE REP ASKED ME IF THE MESSAGE RECURRED AFTER TURNING THE CAR OFF AND BACK ON AND