I WAS DRIVING ON A FOUR LANE INTERSTATE IN CRUISE CONTROL GOING 70 MPH. SUDDENLY I WAS GOING DOWN THE HIGHWAY SIDEWAYS. I SLID OFF THE ROAD AND HIT A HIGHWAY SIGN WHICH SLOWED ME AND MUST HAVE JARRED SOMETHING BECAUSE THEN I COULD USE MY BRAKES AND ALL FOUR OF THEM SEEMED TO WORK. I SMASHED THE DRIVERS SIDE DOOR AND ROCKER PANEL AND OTHER DAMAGE, PROBABLY BENT THE RIM ON A TIRE, HAD CUTS ON BOTH HANDS AND HAD TO TAKE MY DOGS AND CAT TO THE VET AS THEY WERE IN SHOCK. I WAS ABOUT 130 TO 150 MILES FROM HOME AND THANKS TO FRIENDS WAS ABLE TO GET HOME THAT EVENING. THE CHEVROLET DEALERSHIP I HAD IT TOWED TO, SAID THEY COULD FIND NO REASON FOR THE REAR WHEELS TO LOCK. BUT ACCORDING TO THE DPS OFFICER THAT IS WHAT THEY SEEMED TO DO. *NM