Matthew Brabham has won the opening race in Round 3 of the Stadium Super Trucks on the streets of Long Beach.
Paul Morris finished second, having led the race at the halfway mark.
Brabham, who ran second to Morris at that time, had to come from the rear of the grid after setting the fastest lap in qualifying.
Gavin Harlien finished third.
Race 2 will follow the IndyCar race on Sunday afternoon local time (Monday morning AEST).