MY FAMILY WAS INVOLVED IN A FRONTAL COLLISION IN APRIL OF 97.WE FILED A SUIT WITH GM AND LOST BECAUSE OF THE COMPARATIVE LAW IN TN. HOWEVER, DURING THE LAW SUIT WE WERE INFORMED THAT NHTSA DOES NOT OR DID NOT REQUIRE A CRASH WORTHINESS TEST ON SEAT BACK STRENGTH ON DRIVERS SIDE IF LOADED DURING A CRASH.I AM REPORTING TO YOU THAT THERE IS A PROBLEM WITH THIS AND WE FEEL THAT SOME KIND OF TESTS NEED TO BE REQUIRED.DURING THE TRIAL WE MET SEVERAL PEOPLE THAT COMPLAINED TO NHTSA AND TO GM ABOUT BOTH DRIVERS SEATBACK AND PASSENGER SEATBACKS COMING FORWARD IN A FRONTAL COLLISION.THESE SILVERADO EXTENDED CAB TRUCKS NEED TO BE TESTED OR THE SEATS NEED TO BE REMOVED AND SUPPLEMENTED WITH THE BUCKET SEATS THAT GM SUBED IN DURING THE MIDDLE OF PRODUCTION.GM WAS AWARE OF THE PROBLEM AND DID COMPLY WITH THE MOTOR VEHICLE SAFETY STANDERS.I BELIEVE THAT THE STANDERS MUST BE REVISED.THE AMERICAN CONSUMER SPENDS 20,000-$30,000.00 ON VEHICLES AND THE SHOULD FEEL SAFE.THE EXTENDED CAB SIVERADO PICK-UP IS A SHARP LOOKING VEHICLE AND IT KEEPS VALUE SO IT IS APPEALING TO CONSUMERS AS IT APPEALED TO ME. THERE ARE SEVERAL HUNDREDS OF VEHICLES OUT THERE BETWEEN 1987-1992 THAT HAVE THIS SEATBACK LOCKING MECHANISM.PLEASE LOOK INTO THIS BEFORE ANYONE ELSE GETS HURT. MR