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 offers for the overhaul of buses to be used by Grand Canyon National Park. Interested vendors should review the attached PartsManual_Pages1-100_0003.pdf file for additional scope and requirement details. The opportunity is open to all responsible sources and proposals are due by the date specified within the solicitation documentation.