Vehicle and one piece shroud

A one piece fan shroud (10) for a vehicle, preferably a tractor, has first and second faces, a frame with top, left and right sides, a bottom, and an upper wall extending from the top of the frame. The upper wall, left and right sides of the fan shroud (10) are dimensioned to match the internal geometry and seal with an internal surface of a vehicle hood (30). A seal (34) may extend around the upper wall and the left and right sides of the frame.