This document provides details on a federal contract opportunity for bus overhaul services for the National Park Service Intermountain Region. The solicitation number is 140P1521Q0003 and seeks proposals for the overhaul of buses to be operated by the Grand Canyon Region. Interested parties should review the Parts Manual covering pages 201 through 300 and respond with overhaul proposals for the buses by the deadline. The contract is expected to be awarded by the Department of the Interior National Park Service Intermountain Region to provide these essential vehicle maintenance and repair services.