The Grand Prairie Library digital resources offer a great African American Heritage research tool at https://www.gptx.org/Departments/Library/eBranch, under the Genealogy tab. You will need a library card number and PIN to access.
If you need a library card, you may get one, for free, at any library, or online:
Apply for a free library card
From the "It Happened in Grand Prairie" archives, learn more about the history of African Americans in Grand Prairie by viewing the Black History Month playlist on the city's YouTube channel.