The ornamental design for a grilleaccent side panel, as shown and described.
FIG. 1 is a perspective view of a grille accent side panel showing a first embodiment of our new design in the environment of a vehicle;
FIG. 2 is a front perspective view of the grille accent side panel shown in FIG. 1;
FIG. 3 is a front view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a left side view thereof.
FIG. 6 is a perspective view of a grille accent side panel showing a second embodiment of our new design in the environment of a vehicle; which is a mirror image of the grille accent side panel shown in FIGS. 1-5;
FIG. 7 is a front perspective view of the grille accent side panel shown in FIG. 6;
FIG. 8 is a front view thereof;
FIG. 9 is a top view thereof; and,
FIG. 10 is a left side view thereof.
The broken lines shown in FIG. 1 and FIG. 6, illustrate environmental subject matter that forms no part of the claimed design. The broken lines in FIGS. 2, 4, 5, 7, 9 and 10, illustrate portions of the grille accent side panel that form no part of the claimed design.