1956: Very similar to 1955 Second Series trucks, with the following exceptions:
Hood emblem is longer at the bottom than at top. Fender emblems are similar to 1955 Second Series models, but are placed above the fender crease.
 

1957: Hood emblem same as 1956, different color scheme. Fender emblems now elongated ovals. Hood has two parallel creases running front to back.
Only year that Cameo models have the actual number designation (3124) on fender emblems instead of 3100.
Grille changed to more stylish look with an oval inner piece suspended with top and bottom "teeth."
 

1958: Dual headlights introduced. Hood emblem slightly longer. Fender emblems now shaped like an airplane and remain above the fender crease, close to the cab. Grille radically different. Hood now has a "dip" in the centre.
First year that Chevrolet pickups are given the name "Apache" on their fender emblems. The name would only last through 1961.
Series designation is changed to 31 for 1/2 ton shortbeds, 32 for 1/2 ton longbeds, 36 for 3/4 ton and 38 for 1 ton.
Last year for the Cameo Carrier, which is replaced mid-year with the new Fleetside, which has steel rear fenders instead of fiberglass as used on the Cameos.
 

1959: Basically the same as 1958, with a much longer hood emblem and missile-shaped fender emblems that read "CHEVROLET APACHE" and the series designation (31, 32, 36 or 38) and which are placed close to the headlights.
Last year of the Task-Force series of trucks. Chevrolet introduced a new style for its 1960 models.