ENTERING STRAIGHT STRETCH OF 2 LANE HWY.,I SWERVED TO MISS OBJECT IN MY LANE AND PART OF ADJACENT LANE. I COULD NOT STRAIGHTEN UP VEHICLE. THE VEHICLE ROLLED AND STRUCK A TREE. THE ENGINE WAS OFF AND THE AIR BAGS DID NOT INFLATE. MY DOOR WAS DAMAGED AND HAD TO BE CUT OFF TO FREE MYSELF. THE ENVOY WAS TOTALED. MY WIFE'S HARNESS DID NOT HOLD AND SHE WAS FACING THE REAR BETWEEN THE FRONT SEATS. THE SIDE AIR BAGS AND FRONT AIR BAGS DID NOT WORK. THE VEHICLE WAS WELL MAINTAINED WITH NEW TIRES AND BRAKES. I WAS LIFE FLIGHTED, AND MY WIFE WAS CARRIED BY AMBULANCE TO THE HOSPITAL WHERE WE SUSTAINED MULTIPLE INJURIES. *TR