1853, "worker who moves loads using a cart;" agent noun from truck (v.2). Meaning "person who drives a motorized truck" is by 1935, a shortening of truck driver (1907).
Entries linking to trucker
truck v.2
"to convey on a truck," 1809, from truck (n.). Verbal meaning "dance, move in a cool way," first attested 1935, from popular dance of that name in U.S., supposedly introduced at Cotton Club, 1933. Related: Trucked; trucking.