The ornamental design for a vehicletaillamp, as shown and described.
FIG. 1 is an outer perspective view of driver side vehicle tail lamp showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is top view thereof;
FIG. 4 is bottom view thereof;
FIG. 5 is a outer perspective view of a second embodiment of the vehicle tail lamp thereof, with the vehicle tail lamp from the opposite side of the vehicle being depicted in first embodiment;
FIG. 6 is a front view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view.
It will be understood that the broken lines shown in the drawings illustrate portions of the vehicle tail lamp that form no part of claimed design.