2019 Petit Le Mans
[2] It was the sixth consecutive year the event was held as part of the WeatherTech SportsCar Championship.
[3] The race took place at the 12-turn, 2.540-mile (4.088 km) Road Atlanta in Braselton, Georgia on October 12, 2019.
Scott Atherton would retire from his position as President of the International Motor Sports Association following the event.
[5] In his final race as president, Scott Atherton served as the events grand marshal.
[6] John Doonan would replace Scott Atherton as president of the International Motor Sports Association beginning in 2020.
[8] The Nissan Onroak DPi made its final appearance as Jon Bennett would retire from full time driving.
[9][10] The Chevrolet Corvette C7.R and Porsche 911 RSR also entered their final IMSA events, ahead of the switch to new-generation GTE machinery for both manufacturers in 2020.
[15] Heading into the final race of the season, Dane Cameron and Juan Pablo Montoya led the DPi Drivers' Championship with 274 points; the duo held a twelve-point advantage over Pipo Derani and Felipe Nasr in second.
[16] With 235 points, Matt McMurry led the LMP2 Drivers' Championship, ahead of Cameron Cassels.
[17] In DPi, Juncos Racing made its first appearance since the Canadian Tire Motorsport Park round.
[19] In GTLM, Risi Competizione returned for the first time since the season opening round at Daytona.
[20][21] In GTD, Park Place Motorsports were absent due to not having a spare chassis.
[22] Montaplast by Land-Motorsport and Precision Performance Motorsports made their first appearances since the Watkins Glen round.
Marco Seefried joined Bryan Sellers and Corey Lewis in the Paul Miller Racing entry.
[24] There were four practice sessions preceding the start of the race on Saturday, three on Thursday and one on Friday.
[27] Matthieu Vaxiviere was fifth fastest for Konica Minolta Cadillac while Timo Bernhard in the No.
Later, Nunez, Marks, and Piedrahita spun and got their cars beached at turns 6 and 10a, respectively.
[33] René Binder necessitated the showing of a red flag when he spun and beached the No.
[36] Misha Goikhberg necessitated the showing of a red flag when he spun and beached the No.
85 JDC-Miller Cadillac in the gravel trap at turn 10 with 17 minutes remaining in the session.
[25] Cars in GTD were sent out first before those grouped in GTLM and DPi/LMP2 had two separate identically timed sessions.
All cars were required to be driven by one participant and the starting order was determined by the competitor's fastest lap.
[25] IMSA then arranged the grid so that the DPi, LMP2, and GTLM cars started in front of the GTD field.
31 Cadillac set a new track record to clinch pole position with a time of 1 minute and 08.457 seconds.
54 CORE Autosport Nissan driven by Jon Bennett rounded out the DPi qualifiers.
62 Ferrari set a new category track record to take pole position with a time of 1 minute and 15.639 seconds.
3 Corvette set the second fastest time, but would start at the back of the GTLM field after his car failed the post-qualifying technical inspection where it was discovered that the Corvette was found to not have complied with mandated ride height.
33 Mercedes-AMG on the grid's front row with his best lap being 0.135 second slower, and Jeff Westphal drove the No.
96 Turner Motorsport BMW failed to record a time due to Robby Foley spinning at turn 10a and beaching the car at the gravel trap on his outlap.
47 Precision Performance Motorsports entries lost all their lap times due to both teams crew touching their respective cars.
