The ornamental design for a vehicledashboard, as shown and described.
FIG. 1 is a top, front, left side perspective view of a vehicle dashboard showing our new design;
FIG. 2 is a front elevation view thereof; and,
FIG. 3 is a top plan view thereof.
The dash-dash broken lines illustrate portions of the dashboard that form no part of the claimed design. The dash-dash lines illustrating a steering wheel show environmental matter that forms no part of the claimed design. The dot-dash broken lines are borders of the claimed design and form no part of the claimed design.