Johnny Sauter regained the lead with 11 laps to go Friday night and went on to his second NASCAR Truck Series victory this season, both coming at Texas.
Sauter made the winning pass in his Toyota around Parker Kligerman, who took only two tires his last stop and couldn't hold on to the lead.
Season points leader James Buescher, who started second, finished 11th - the last truck on the lead lap. With two races left, his points lead over Ty Dillon was cut from 21 to 15.
Dillon finished fifth.
It was the sixth career victory for Sauter, who became the third driver to sweep both races at the 1 1/2-mile high-banked Texas track in the same season.
Nelson Piquet Jr. was third and Kyle Busch fourth.