In the past two decades, the fields of public health and social services have increasingly turned toward collaborative and community-based approaches to address complex health and social issues. One aspect of these approaches has been the development and implementation of community coalitions. Coalitions have been used to successfully address a wide range of issues, including cancer prevention, tobacco use, HIV/AIDS, youth violence, heart disease, diabetes, and sexual exploitation of youth runaways. In south Tucson, Arizona the SEAH coalition was developed to address diabetes and substance abuse prevention. Using a qualitative interview guide, the Culture of Health Survey, this study was aimed at identifying community perceptions of the coalition and its effectiveness in the areas of community leadership, partnerships, trust, and movement towards positive change. We also sought to document the dissemination, throughout a community, of information on the activities and functioning of a community based coalition and whether or not it was seen as one that held fast to the community values and not to individual agendas. Results highlight the importance of outreach, education, trust, and partnerships in promoting diabetes prevention through a community coalition.