| 1st | 31 | Nasr / Derani / Conway | Cadillac DPi-V.R | Whelen Engineering Racing | 1:45.354 | 1:45.3540 | 1:46.1510 | | 1:46.2120 | 1:46.8980 |
| 2nd | 10 | Taylor / Albuquerque / Rossi | Acura ARX-05 | Konica Minolta Acura | 1:45.464 | 1:45.4640 | 1:46.6540 | 1:48.8280 | 1:47.4460 | 1:47.4420 |
| 3rd | 01 | van der Zande / Magnussen / Dixon | Cadillac DPi-V.R | Cadillac Chip Ganassi Racing | 1:45.849 | 1:45.8490 | 1:46.1510 | 1:48.6120 | 1:46.6190 | 1:47.3520 |
| 4th | 55 | Jarvis / Tincknell / Bomarito | Mazda RT24-P | Mazda Motorsports | 1:46.253 | 1:46.2530 | 1:46.8410 | 1:48.6130 | 1:47.5790 | 1:48.2110 |
| 5th | 60 | Cameron / Pla / Montoya | Acura ARX-05 | Meyer Shank Racing w/ Curb-Agajanian | 1:46.377 | 1:46.3770 | 1:46.6410 | 1:46.8330 | 1:46.9250 | 1:47.9450 |
| 6th | 48 | Johnson / Kobayashi / Pagenaud | Cadillac DPi-V.R | Ally Cadillac Racing | 1:46.424 | 1:47.6100 | 1:46.4240 | 1:48.0830 | 1:47.5990 | 1:47.7390 |
| 7th | 5 | Vautier / Duval / Bourdais | Cadillac DPi-V.R | Mustang Sampling/JDC-Miller MotorSports | 1:46.549 | 1:46.5490 | 1:46.6790 | 1:47.4100 | 1:47.1600 | 1:47.8550 |
| 8th | 52 | Keating / Jensen / Huffaker | Oreca 07 Gibson | PR1 Mathiasen Motorsports | 1:48.474 | 1:51.1480 | 1:48.4740 | | 1:49.9200 | 1:50.2700 |
| 9th | 22 | McGuire / Boyd / Smith | Oreca 07 Gibson | United Autosports | 1:48.673 | 1:55.4000 | 1:48.6730 | | 1:50.7450 | 1:50.7620 |
| 10th | 18 | Merriman / Tilley / Dalziel | Oreca 07 Gibson | Era Motorsport | 1:48.944 | 1:52.3880 | 1:48.9440 | 1:51.1570 | 1:53.1440 | 1:52.0860 |
| 11th | 8 | Farano / Aubry / Buret | Oreca 07 Gibson | Tower Motorsport | 1:49.084 | 1:56.1420 | 1:49.0840 | 1:52.3710 | 1:52.4860 | 1:50.8750 |
| 12th | 11 | Thomas / Nunez / Merrill | Oreca 07 Gibson | WIN Autosport | 1:49.619 | 1:51.0250 | 1:49.6190 | 1:51.0650 | 1:50.6800 | 1:51.7490 |
| 13th | 3 | Taylor / Catsburg / Garcia | Chevrolet Corvette C8.R | Corvette Racing | 1:54.910 | 1:54.9100 | 1:55.6420 | | 1:56.7150 | 1:57.0190 |
| 14th | 4 | Tandy / Sims / Milner | Chevrolet Corvette C8.R | Corvette Racing | 1:54.944 | 1:54.9440 | 1:57.2360 | | 1:57.5770 | 1:57.2050 |
| 15th | 25 | De Phillippi / Eng / Spengler | BMW M8 GTE | BMW Team RLL | 1:55.062 | 1:55.0620 | 1:55.7270 | 1:57.2190 | 1:57.4640 | 1:57.2230 |
| 16th | 24 | Farfus / Edwards / Krohn | BMW M8 GTE | BMW Team RLL | 1:55.281 | 1:55.2810 | 1:55.8610 | 1:56.8550 | 1:57.7520 | 1:57.5580 |
| 17th | 79 | MacNeil / Jaminet / Campbell | Porsche 991 RSR 19 | WeatherTech Racing | 1:55.732 | 1:56.1190 | 1:55.7320 | 1:56.8480 | 1:56.8910 | 1:56.5630 |
| 18th | 38 | Lindh / Goldburg / Llarena | Ligier JS P320 Nissan | Performance Tech Motorsports | 1:56.001 | 1:56.0010 | 1:56.9810 | 1:57.5760 | 1:58.1220 | 1:58.2100 |
| 19th | 7 | McAleer / Askew / McCusker | Duqueine M30-D08 Nissan | Forty7 Motorsports | 1:56.066 | 1:56.0660 | 1:56.5890 | 2:00.3470 | 1:59.0720 | 1:57.9840 |
| 20th | 54 | Bennett / Kurtz / Braun | Ligier JS P320 Nissan | Core Motorsport | 1:56.166 | 1:58.1510 | 1:56.1660 | | 1:56.9920 | 1:58.1160 |
| 21st | 74 | Robinson / Pigot / Andrews | Ligier JS P320 Nissan | Riley Motorsports | 1:56.183 | 1:56.9740 | 1:56.1830 | | 1:57.1510 | 1:57.7940 |
| 22nd | 91 | Cox / Murry / Bleekemolen | Ligier JS P320 Nissan | Riley Motorsports | 1:56.281 | 1:58.5460 | 1:56.2810 | | 1:57.1510 | 1:57.2690 |
| 23rd | 33 | Willsey / Barbosa / Clairay | Ligier JS P320 Nissan | Sean Creech Motorsport | 1:56.340 | 1:58.9910 | 1:56.3400 | 1:57.0430 | 1:57.3350 | 1:58.7400 |
| 24th | 83 | Krütten / Bell / Sales | Duqueine M30-D08 Nissan | WIN Autosport | 1:57.057 | 1:59.9500 | 1:57.1060 | 2:02.8820 | 1:57.0570 | 1:59.6890 |
| 25th | 14 | Telitz / Hawksworth / Kirkwood | Lexus RC F GT3 | Vasser-Sullivan Racing | 1:59.247 | 1:59.2470 | 2:01.0000 | | 2:00.6630 | 2:01.6010 |
| 26th | 9 | Robichon / Vanthoor / Kern | Porsche 991 GT3 R | Pfaff Motorsports | 1:59.617 | 1:59.6170 | 2:00.8350 | 2:02.8800 | 2:01.7350 | 2:01.2410 |
| 27th | 19 | Simpson / Perera / Zimmermann | Lamborghini Huracán GT3 Evo | GRT Grasser Racing Team | 1:59.711 | 1:59.7110 | 2:01.5010 | 2:02.3580 | 2:00.9660 | 2:01.7550 |
| 28th | 75 | Habul / Engel / Grenier | Mercedes-AMG GT3 Evo | SunEnergy1 Racing | 1:59.848 | 1:59.8480 | 2:01.1250 | 2:01.6730 | 2:01.1110 | 2:02.0030 |
| 29th | 12 | Veach / Megennis / Montecalvo | Lexus RC F GT3 | Vasser-Sullivan Racing | 1:59.992 | 1:59.9920 | 2:01.4500 | | 2:01.7000 | 2:02.7730 |
| 30th | 16 | Long / Heylen / Hindman | Porsche 991 GT3 R | Wright Motorsports | 2:00.007 | 2:00.0070 | 2:00.8080 | 2:01.2240 | 2:01.2400 | 2:01.8820 |
| 31st | 96 | Auberlen / Foley / Read | BMW M6 GT3 | Turner Motorsport | 2:00.194 | 2:00.1940 | 2:01.2980 | 2:00.6650 | 2:00.4560 | 2:02.4040 |
| 32nd | 99 | Ferriol / Bamber / Estep | Porsche 991 GT3 R | Team Hardpoint EBM | 2:00.223 | 2:00.2230 | 2:01.3250 | 2:01.4250 | 2:01.1400 | 2:02.0260 |
| 33rd | 23 | James / de Angelis / Gunn | Aston Martin Vantage AMR GT3 | Heart of Racing Team | 2:00.307 | 2:00.3070 | 2:01.4020 | 2:01.9760 | 2:01.9500 | 2:02.1800 |
| 34th | 28 | Morad / de Quesada / Johnson | Mercedes-AMG GT3 Evo | Alegra Motorsports | 2:00.328 | 2:00.3280 | 2:01.9600 | 2:02.5980 | 2:01.6360 | 2:02.8330 |
| 35th | 1 | Sellers / Snow / Lewis | Lamborghini Huracán GT3 Evo | Paul Miller Racing | 2:00.689 | 2:00.6890 | 2:01.3530 | 2:01.1500 | 2:01.6610 | 2:02.1320 |
| 36th | 88 | Nielsen / Legge / Figueiredo | Porsche 991 GT3 R | Team Hardpoint EBM | 2:00.829 | 2:00.8290 | 2:01.4840 | 2:04.9580 | 2:03.8810 | 2:03.2300 |
| 37th | 44 | Potter / Lally / Pumpelly | Acura NSX GT3 | Magnus Racing with Archangel Motorsports | 2:01.178 | 2:01.1780 | 2:01.9230 | 2:02.8820 | 2:02.8890 | 2:02.7620 |