2023 12 Hours of Sebring

Cadillac Racing entered as the defending overall winners of the 12-hour event, albeit in the new-for-2023 GTP class rather than DPi.

The Iron Dames trio of Michelle Gatting, Rahel Frey, and Sarah Bovy, for instance, competed in both the GTE Am category of the 1000 Miles of Sebring as well as the GTD class in the 12-hour.

[6] A total of 27 drivers pulled double duty across the two races, with only Dane Cameron and Michael Christensen running in the top class for both.

[7] After the 24 Hours of Daytona 5 weeks earlier, Tom Blomqvist, Colin Braun, Hélio Castroneves, and Simon Pagenaud were leading the GTP Drivers' Championship with 385 points.

[9] After the penalty was applied, Filipe Albuquerque, Ricky Taylor, Louis Delétraz, and Brendon Hartley took the lead in the GTP Drivers' Championship with 350 points while WTR with Andretti Autosport took the lead in the GTP Teams' Championship.

[10] Jules Gounon, Daniel Juncadella, Maro Engel, and Cooper MacNeil led the GTD Pro Drivers' Championship.

[10] In GTD, Roman De Angelis, Marco Sørensen, Ian James, and Darren Turner led the Drivers' Championship with 375 points.

On March 8, 2023, IMSA released the latest technical bulletin outlining Balance of Performance for the GTP and LMP2 classes.

[11] Wholesale changes were introduced to the top class following the 24 Hours of Daytona, where all cars ran on equal metrics.

[13] The Porsche received a five millimeter increase to its air restrictor after suffering from a lack of straight-line speed at Daytona.

This change marked a four millimeter increase from the Sebring test, after which several Porsche teams threatened to withdraw their entries from the series if BoP concerns were not addressed.

[14] The new-for-2023 Lamborghini also received an air restrictor size increase from 47 to 49 millimeters after suffering from a similar lack of pace in the opening round.

The former race was won by Robby Foley and Vin Barletta of Turner Motorsport,[16] while Riley Dickinson swept the pair of Carrera Cup events.

Cadillac Racing's second car, in accordance with the team's plan for the entry to conduct the 2023 FIA World Endurance Championship season, was removed.

[19] In LMP3, Ave Motorsports made their season debut, competing with Seth Lucas,[20] Trenton Estep, and Tõnis Kasemets.

Jr III Racing, also making their season debut at Sebring, added Dakota Dickerson to their driver lineup of Ari Balogh and Garett Grist just weeks before the event, ensuring that the class runners-up from 2022 returned.

[21] Dickerson's place in the Andretti Autosport lineup was filled by Dutch driver Glenn van Berlo.

[26] Kyle Kirkwood and Franck Perera were added to the Vasser Sullivan Racing and Iron Lynx lineups, respectively.

After initially committing to the Michelin Endurance Cup, SunEnergy1 Racing were also absent from the Sebring entry list, as were NTE Sport and the Iron Lynx #19.

NTE Sport cited financial difficulties following their Daytona crash as the primary reason for their absence.

10 Acura lapped quickest at 1:48.303, 0.133 seconds ahead of CGR's Renger van der Zande.

14 Vasser Sullivan Racing Lexus RC F GT3 of Jack Hawksworth while Trent Hindman set the fastest time amongst all GTD cars.

[32] Rasmussen led LMP2 with a 1:50.506 lap in Era Motorsport's car, 0.767 seconds ahead of Nolan Siegel in CrowdStrike's No.

Antonio García qualified on pole in GTD Pro driving the #3 Corvette Racing entry.

The session saw one incident when Klaus Bachler, #9 Pfaff Motorsports entry, crashed at turn one.

Bachler had his best two laps from the session deleted for causing a red flag, effectively leaving him with no time set.

The session saw one incident when Matt Campbell, driving the #7 Porsche Penske Motorsport entry, crashed at turn one.

33 Sean Creech Motorsport Ligier crashed at turn one and suffered front end damage.

[47][48] When racing resumed, Brendan Iribe spun at turn five after making contact with Michelle Gatting's No.

Lewis, Sellers, and Snow jumped from eighth to second while De Angelis, Sørensen, and James dropped from first to fifth.