The second generation of Chevrolet C/K trucks—those produced from the 1967-1972 model years—is well-known for contributing some of the finest looking trucks of the series, as well as for providing a launch-pad for new models that would soon ingratiate themselves with American auto buyers.

Dubbed the "Action Line," the C/K platform during the late 60s and early 70s spawned popular models like the Chevy Suburban, GMC Carryall and the K5 Blazer. It also helped introduce two common GM trim names, the Chevy Cheyenne and GMC Sierra, names that are still employed today. 

This evolution was made possible by a ground-up platform overhaul of the C/K line for the 1967 model year, where GM intentionally advanced durability, capacity, comfort, and convenience with an eye toward enabling multiple applications.

Minor changes rolled out through the model years, including a 50th Anniversary Package to commemorate Chevy's birthday in 1968, a foot-powered parking brake in 1969, and in 1971, a mid-cycle refresh that included a new eggcrate-style grille, front disc brakes, tilt steering column (optional), and AM/FM radio.

For the final year of the generation, the C/K truck—like this strikingly gorgeous Seafoam Green example—received two minor cosmetic changes: an armrest integrated to the door, and the rear-view mirror re-positioned from the headliner to the windshield.

You could buy the "Action Line" in one of three payloads: the 1/2 ton (C/K10), 3/4 ton (C/K20), and 1 ton (C/K30). It was available in either 2-wheel drive (C) or 4-wheel drive (K), and there were 2 bed configurations and 3 wheelbase lengths.