INFORMATION OBTAINED FROM GM INDICATES THAT FURTHER INVESTIGATION TO DETERMINE THE CAUSE OF WHEEL SEPARATIONS IS WARRANTED.IN GM'S RESPONSE DATED APRIL 26, 1996, GM STATED THAT:GM HAS NOT IDENTIFIED ANY DEFECT IN THE MANUFACTURE OF THE SUBJECT VEHICLES WHIH MAY CONTRIBUTE TO WHEEL SEPARATION.INVESTIGATION AS TO THE ROOT CAUSE OF WHEEL SEPARATIONS IS CONTINUING.THE RESULTS OF THESE FURTHER INVESTIGATIONS ARE REQUIRED TO ASSESS THE PROBABILITY OF ANY FUTURE INCIDENTS . . .