The useful first step at Dallas Fort Worth International Airport is to treat the airport's own transportation page as the source of truth. After baggage claim, follow current rental-car signs and keep the destination---DFW Rental Car Center transfer---in view rather than navigating to an unrelated public address.
Use DFW's current terminal signage and airport transportation instructions to reach the Rental Car Center. Confirm the terminal pickup point on arrival rather than relying on a generic map pin, especially when airport works change curb access.
Before leaving the facility, confirm the agency's current hours, identification and payment requirements, vehicle notes, and return instructions. Photograph the vehicle condition and keep the official airport and agency pages available for the trip home.