Which chassis manufacturer is for fleet numbers range 2530-2558
CREATE TABLE "table1_1425948_1" (
  "chassis_manufacturer" text,
  "chassis_model" text,
  "body_model" text,
  "number_in_fleet" real,
  "fleet_numbers" text
);
SELECT "chassis_manufacturer" FROM "table1_1425948_1" WHERE "fleet_numbers"='2530-2558';