In 1958 all Chevrolet models were updated. It definitely stood they out from the previous units. Among the changes were quad-headlights, a new and much wider grille with integral parking lights, new dashboard and interior, and new series designations.
The medium-duty series 4000 and 6000 received the Viking name. The Vikings were the 1.5- and 2-ton range and could be ordered as chassis/cowls; chassis/windshield; chassis/cab, or as complete stake trucks. Wheelbases were 132.5-inch, 144.5-inch, and 156.5-inch. The Vikings had GVW rating of up to 21000 pounds.