GTP 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.
