| 1st | 31 | Nasr / Conway / Derani | Cadillac DPi-V.R | Whelen Engineering Racing | 1:08.678 | 1:08.6780 | 1:09.3240 | 1:11.6000 | 1:09.4000 | 1:11.5260 |
| 2nd | 55 | Jarvis / Tincknell / Bomarito | Mazda RT24-P | Mazda Motorsports | 1:08.693 | 1:08.6930 | 1:09.5090 | 1:10.1810 | 1:09.3560 | 1:11.4270 |
| 3rd | 5 | Vautier / Duval / Bourdais | Cadillac DPi-V.R | Mustang Sampling/JDC-Miller MotorSports | 1:08.848 | 1:08.8480 | 1:10.1430 | 1:12.5730 | 1:09.5710 | 1:10.7960 |
| 4th | 01 | van der Zande / Bamber / Dixon | Cadillac DPi-V.R | Cadillac Chip Ganassi Racing | 1:08.879 | 1:08.8790 | 1:09.8680 | 1:11.0570 | 1:09.6870 | 1:10.8220 |
| 5th | 60 | Cameron / Castroneves / Montoya | Acura ARX-05 | Meyer Shank Racing w/ Curb-Agajanian | 1:08.920 | 1:08.9200 | 1:09.3510 | 1:16.8520 | 1:09.7740 | 1:11.6470 |
| 6th | 48 | Johnson / Kobayashi / Pagenaud | Cadillac DPi-V.R | Ally Cadillac Racing | 1:09.165 | 1:09.1650 | 1:09.8740 | | 1:10.2810 | 1:11.6710 |
| 7th | 10 | Taylor / Albuquerque / Rossi | Acura ARX-05 | Konica Minolta Acura | 1:09.328 | 1:09.3280 | 1:09.8400 | 1:10.9930 | 1:10.0960 | 1:11.4720 |
| 8th | 52 | Keating / Jensen / Huffaker | Oreca 07 Gibson | PR1 Mathiasen Motorsports | 1:10.782 | 1:12.2290 | 1:10.7820 | | 1:11.9300 | 1:11.5890 |
| 9th | 11 | Thomas / Nunez / Merrill | Oreca 07 Gibson | WIN Autosport | 1:10.807 | 1:12.5830 | 1:10.8070 | | 1:12.1210 | 1:14.7910 |
| 10th | 8 | Farano / Aubry / French | Oreca 07 Gibson | Tower Motorsport | 1:11.281 | 1:14.2890 | 1:11.2810 | 1:12.5610 | 1:11.7180 | 1:13.4860 |
| 11th | 22 | McGuire / Boyd / Smith | Oreca 07 Gibson | United Autosports | 1:11.623 | 1:14.8140 | 1:11.6230 | 1:19.4070 | 1:11.9330 | 1:13.5140 |
| 12th | 18 | Merriman / Tilley / Dalziel | Oreca 07 Gibson | Era Motorsport | 1:12.069 | 1:13.0700 | 1:14.3080 | 1:12.0690 | 1:12.6640 | 1:12.3230 |
| 13th | 24 | Farfus / Edwards / Krohn | BMW M8 GTE | BMW Team RLL | 1:15.226 | 1:15.2260 | 1:16.2420 | 1:18.8710 | 1:17.5190 | 1:17.5540 |
| 14th | 2 | Krütten / Gamble / Meyrick | Ligier JS P320 Nissan | United Autosports USA | 1:15.664 | 1:15.6640 | 1:16.6770 | 1:21.2030 | 1:17.0950 | 1:18.1610 |
| 15th | 79 | MacNeil / Jaminet / Campbell | Porsche 991 RSR 19 | WeatherTech Racing | 1:15.738 | 1:15.7380 | 1:16.4170 | 1:17.7400 | 1:16.8840 | 1:17.5080 |
| 16th | 38 | Goldburg / Lindh / Jakobsen | Ligier JS P320 Nissan | Performance Tech Motorsports | 1:15.750 | 1:15.7500 | 1:16.4560 | 1:16.4310 | 1:17.1150 | 1:16.6050 |
| 17th | 54 | Bennett / Kurtz / Braun | Ligier JS P320 Nissan | Core Motorsport | 1:15.916 | | 1:16.2650 | 1:17.8560 | 1:15.9160 | 1:16.7810 |
| 18th | 3 | Taylor / Garcia / Catsburg | Chevrolet Corvette C8.R | Corvette Racing | 1:15.930 | 1:15.9300 | 1:16.7710 | | 1:17.3590 | 1:18.1700 |
| 19th | 30 | Balogh / Grist / Pigot | Ligier JS P320 Nissan | JR III Racing | 1:15.942 | 1:19.0710 | 1:15.9420 | 1:16.8890 | 1:15.9740 | 1:17.4200 |
| 20th | 97 | Estre / Christensen / Makowiecki | Porsche 991 RSR 19 | WeatherTech Racing | 1:16.004 | 1:16.0040 | 1:16.3630 | 1:18.0860 | 1:16.7260 | 1:17.2530 |
| 21st | 74 | Robinson / Fraga / Andrews | Ligier JS P320 Nissan | Riley Motorsports | 1:16.033 | 1:17.5350 | 1:16.0330 | | 1:16.1810 | 1:17.6560 |
| 22nd | 4 | Tandy / Milner / Sims | Chevrolet Corvette C8.R | Corvette Racing | 1:16.051 | 1:16.0510 | 1:16.2330 | 1:25.6930 | 1:16.9380 | 1:18.2160 |
| 23rd | 91 | Cox / Murry / Bleekemolen | Ligier JS P320 Nissan | Riley Motorsports | 1:16.284 | 1:17.4030 | 1:16.2840 | | 1:16.4130 | 1:16.9690 |
| 24th | 25 | De Phillippi / Eng / Spengler | BMW M8 GTE | BMW Team RLL | 1:16.669 | 1:21.2990 | 1:16.6690 | 1:18.9490 | 1:17.8300 | 1:17.7670 |
| 25th | 83 | Bell / Rao / Skelton | Duqueine M30-D08 Nissan | WIN Autosport | 1:16.824 | | 1:17.2230 | 1:24.3700 | 1:16.8240 | 1:18.3370 |
| 26th | 36 | Andretti / Burdon / Askew | Ligier JS P320 Nissan | Andretti Autosport | 1:17.122 | 1:17.1220 | 1:17.3230 | 1:17.8650 | 1:18.0620 | 1:20.5960 |
| 27th | 40 | Archer / Vance / Hanratty | Duqueine M30-D08 Nissan | FastMD Racing | 1:17.308 | 1:18.1220 | 1:17.3080 | 1:24.4990 | 1:18.5480 | 1:24.6550 |
| 28th | 7 | Pflucker / Kvamme / Rzadzinski | Duqueine M30-D08 Nissan | Forty7 Motorsports | 1:17.793 | 1:17.7930 | 1:18.1220 | 1:27.6990 | 1:18.3650 | 1:19.5690 |
| 29th | 14 | Telitz / Hawksworth / Kirkwood | Lexus RC F GT3 | Vasser-Sullivan Racing | 1:18.843 | 1:18.8430 | 1:20.2000 | | 1:19.5640 | 1:20.3420 |
| 30th | 1 | Sellers / Snow / Lewis | Lamborghini Huracán GT3 Evo | Paul Miller Racing | 1:18.932 | 1:18.9320 | 1:19.3100 | 1:21.2420 | 1:19.8260 | 1:20.8840 |
| 31st | 96 | Auberlen / Foley / Read | BMW M6 GT3 | Turner Motorsport | 1:18.973 | 1:18.9730 | 1:19.8820 | 1:19.9360 | 1:19.1970 | 1:20.8260 |
| 32nd | 12 | Veach / Montecalvo / Megennis | Lexus RC F GT3 | Vasser-Sullivan Racing | 1:19.133 | 1:19.1330 | 1:20.1700 | | 1:19.7470 | 1:20.8440 |
| 33rd | 19 | Goikhberg / Perera / Beretta | Lamborghini Huracán GT3 Evo | GRT Grasser Racing Team | 1:19.188 | 1:19.1880 | 1:20.3170 | 1:21.3140 | 1:20.1010 | 1:20.6080 |
| 34th | 9 | Robichon / Vanthoor / Kern | Porsche 991 GT3 R | Pfaff Motorsports | 1:19.193 | 1:19.1930 | 1:19.7450 | 1:19.9610 | 1:20.0030 | 1:20.5990 |
| 35th | 42 | Yount / Conwright / Hites | Audi R8 LMS GT3 | NTE Sport | 1:19.197 | 1:19.1970 | 1:20.1620 | 1:29.1820 | 1:19.5920 | 1:20.3620 |
| 36th | 23 | de Angelis / Gunn / James | Aston Martin Vantage AMR GT3 | Heart of Racing Team | 1:19.340 | 1:19.3400 | 1:19.5710 | 1:20.5200 | 1:20.4570 | 1:21.3150 |
| 37th | 70 | Iribe / Schandorff / Barnicoat | McLaren 720S GT3 | Inception Racing | 1:19.366 | 1:21.2780 | 1:20.3480 | 1:30.0680 | 1:19.3660 | 1:21.2660 |
| 38th | 16 | Hindman / Long / Heylen | Porsche 991 GT3 R | Wright Motorsports | 1:19.429 | 1:19.4290 | 1:20.2920 | 1:22.3360 | 1:19.8210 | |
| 39th | 44 | Potter / Lally / Pumpelly | Acura NSX GT3 | Magnus Racing with Archangel Motorsports | 1:19.747 | 1:19.7470 | 1:20.5320 | 1:20.8790 | 1:20.0360 | 1:20.4010 |
| 40th | 57 | Ward / Ellis / Engel | Mercedes-AMG GT3 Evo | Winward Racing | 1:19.771 | 1:19.7710 | 1:20.3170 | 1:21.4240 | 1:20.3600 | 1:21.4370 |
| 41st | 88 | Ferriol / Legge / Davis | Porsche 991 GT3 R | Team Hardpoint EBM | 1:19.821 | 1:19.8210 | 1:20.8300 | 1:23.2540 | 1:21.0070 | 1:22.3660 |
| 42nd | 28 | Morad / de Quesada / Juncadella | Mercedes-AMG GT3 Evo | Alegra Motorsports | 1:19.996 | 1:20.0100 | 1:19.9960 | 1:21.2540 | 1:20.3200 | 1:43.0530 |
| 43rd | 32 | Skeen / Cosmo / McAleer | Mercedes-AMG GT3 Evo | Gilbert/Korthoff Motorsports | 1:20.795 | 1:33.1470 | 1:21.3450 | 1:21.9380 | 1:20.7950 | 1:21.6170 |