Owner notification:owner notification IS expected to begin during june 2, 1997.notes:owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact GMC at 1-800-462-8782 or chevrolet truck at 1-800-222-1020. Also contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.