The ornamental design for a portion of an overheadgarage door façade, as shown and described.
FIG. 1 is an elevational view of a portion of an overhead garage door façade showing my new design in a closed configuration;
FIG. 2 is an elevational view thereof showing a portion of my design in a partially open configuration;
FIG. 3 is an elevational view of a portion of an overhead garage door façade showing a second embodiment of my new design in a closed configuration; and,
FIG. 4 is an elevational view thereof showing a portion of my design in a partially open configuration.
The broken line showing of the simulated door jambs and the remainder of the garage door are for illustrative purposes only and form no part of the claimed design. The broken line showing of the garage building structure in FIGS. 1 through 4 and the vehicles shown in FIGS. 2 and 4 are for illustrating an environment of the design and form no part of the claimed design.