Massive purchasing and maintenance demands have increased due to the vast number of public transit agencies. Vehicle maintenance costs for transit agencies including vehicle parts, equipment, and services have increased significantly due to organizational growth. Cooperative purchasing programs are promising methodologies commonly used to share or bundle purchasing volumes, information, and resources. Cooperative purchasing programs can assist public transit agencies to save time and money because of the economies of scale from increased purchased quantities. Previously, no real case studies had been conducted on cooperative purchasing programs of transit agencies focused on vehicle maintenance. This paper identifies crucial factors needed to be considered when utilizing cooperative purchasing programs through developed targeted questionnaires. The questionnaires are designed to identify the differences between agencies participating in cooperative purchasing programs and agencies not participating in cooperative purchasing programs along with their programmatic paradigms regardless of public transit agency type.