The GPT was the last category to go out and saw persistent rain darken the 2.54-mile, 12-turn road course, leaving every team to swap to rain tyres. As the 20-minute session went on, conditions changed and the track began to dry out in areas and the lap times continued to fall.
In the final seconds, Deletraz was able to put together a late flyer of 1m15.402s in the #10 Acura ARX-06 to secure pole, despite having his lap slightly impacted by the #5 JDC Miller MotorSports Porsche 963 of Mike Rockenfeller.
Sebastien Bourdais managed to put the #01 Cadillac V-Series.R for Chip Ganassi Racing in second, 0.230s behind, and BMW M Team RLL’s Augusto Farfus ended up third at 0.329s behind.
Meyer Shank Racing’s Tom Blomqvist came away fourth despite holding the top spot in the final minute of the session, 0.445s off the top mark.
In LMP2, Ben Keating pulled off the last-gasp flyer of 1m13.859s in the #52 PR1/Mathiasen Motorsports LMP2 ORECA 07, edging out TDS Racing’s Steven Thomas by 0.020s to vault to the fastest outright lap on the day and duly take class pole.
TDS Racing also managed to secure third, though, with John Falb wheeling the #35 machine 0.521s behind.
Source: Autosport