The ornamental design for a tailgateliftback for a vehicle, as shown and described.
FIG. 1 is a front right perspective view of a tailgate liftback for a vehicle according to the present invention.
FIG. 2 is a front left perspective view of the tailgate liftback shown in FIG. 1.
FIG. 3 is a rear left bottom perspective view thereof.
FIG. 4 is a rear right bottom perspective view thereof.
FIG. 5 is a front view thereof.
FIG. 6 is a rear view thereof.
FIG. 7 is a left side view thereof.
FIG. 8 is a right side view thereof.
FIG. 9 is a top view thereof.
FIG. 10 is a bottom view thereof; and,
FIG. 11 is a top view of the tailgate liftback shown in FIG. 1-10, but with the tailgate liftback mounted on a vehicle, and the rest of the vehicle shown in de-emphasized and half-tone portions so as to illustrate environmental structure. These portions form no part of the claimed invention. More particularly, in FIG. 11, the inventive tailgate liftback is shown within the broken line, and the elements shown outside the broken line form no part of the claimed invention, but are instead included to show environmental aspects thereof.