Truck body styles were added to the lineup in October 1978 (having entered production the previous month), including low-deck, high-deck, and "just low" models—these further lowered the bed floor by employing radial tires which had smaller diameters despite the identical 13-inch wheel size. Each of the three models offered standard- and long-wheelbase versions, the latter with as much space as the larger HiAce truck (albeit with a lower payload) and carrying the RR20/RR21 chassis codes—confusing, since the R20-series was generally reserved for the second generation TownAce. At first, trucks received the 1587 cc "12R-J" engine (), until October 1979 when emission standards compliance necessitated the fitment of the 1770 cc "13T-U" motor shared with the wagon. At the same time, the "just low" model adopted 10-inch double tires for the rear wheels, lowering the bed floor to the same level as that of light trucks.