What channel is NASCAR on today ? As for Sunday's Pennzoil 400 at Las Vegas Motor Speedway, the TV channel that will broadcast the race is Fox. The start time for the Pennzoil 400 is 3:30 p.m. ET, and the start time for the pre- race show on Fox is 2:30 p.m. ET. The green flag time is scheduled for 3:46 p.m. ET.