His lap of 183.955 mph set a track record, bettering the mark set by William Byron in 2016. Three drivers posted a speed above the old record.
Gilliland’s lap of 183.212 mph was good enough for second on the grid, followed by Ben Rhodes (183.200 mph) in third.
Gragson also had the fastest lap in round one with a speed of 183.655 mph.
Myatt Snider got loose in Turn 4 and slammed the wall hard. He rolled out a backup truck and will have to start shotgun on the field.