| 1st | 01 | van der Zande / Bourdais / Hunter-Reay | Cadillac DPi-V.R | Cadillac Racing | 1:45.166 | 1:45.1660 | 1:47.6290 | 1:49.7080 | 1:46.7560 | 1:46.1800 |
| 2nd | 31 | Derani / Nunez / Conway | Cadillac DPi-V.R | Whelen Engineering Racing | 1:45.192 | 1:45.1920 | 1:47.0180 | 1:47.9150 | 1:45.7500 | 1:45.9240 |
| 3rd | 10 | Taylor / Albuquerque / Stevens | Acura ARX-05 | Konica Minolta Acura ARX-05 | 1:45.301 | 1:45.3010 | 1:47.1210 | 1:49.6690 | 1:46.6890 | 1:47.5980 |
| 4th | 02 | Bamber / Lynn / Jani | Cadillac DPi-V.R | Cadillac Racing | 1:45.323 | 1:45.3230 | 1:47.2850 | 1:49.1680 | 1:46.2880 | 1:46.5460 |
| 5th | 48 | Rockenfeller / Kobayashi / Lopez | Cadillac DPi-V.R | Ally Cadillac | 1:45.576 | 1:45.5760 | 1:47.0370 | 1:47.9050 | 1:46.1260 | 1:47.4620 |
| 6th | 60 | Jarvis / Blomqvist / Vandoorne | Acura ARX-05 | Meyer Shank Racing W/Curb-Agajanian | 1:46.249 | 1:46.2490 | 1:47.4970 | 1:49.4930 | 1:47.5140 | 1:47.2260 |
| 7th | 5 | Vautier / Westbrook / Duval | Cadillac DPi-V.R | JDC Miller MotorSports | 1:47.235 | 1:51.3380 | 1:47.3660 | 1:47.5080 | 1:47.7410 | 1:47.2350 |
| 8th | 29 | van Eerd / Van Der Garde / Murry | Oreca 07 Gibson | Racing Team Nederland | 1:48.311 | 1:51.6790 | 1:48.3110 | 1:52.4680 | 1:49.7670 | 1:49.4490 |
| 9th | 11 | Thomas / Pierson / Bomarito | Oreca 07 Gibson | PR1 Mathiasen Motorsports | 1:48.842 | 1:50.7320 | 1:50.3550 | no time | 1:49.8890 | 1:48.8420 |
| 10th | 52 | Keating / Jensen / Huffaker | Oreca 07 Gibson | PR1 Mathiasen Motorsports | 1:48.908 | 1:49.9540 | 1:48.9080 | 1:55.1160 | 1:50.2510 | 1:50.6690 |
| 11th | 22 | McGuire / Smith / Tappy | Oreca 07 Gibson | United Autosports | 1:48.979 | 1:53.2090 | 1:48.9790 | 1:59.1820 | 1:50.5000 | 1:53.0220 |
| 12th | 81 | Hedman / Montoya / Montoya | Oreca 07 Gibson | DragonSpeed USA LLC | 1:48.980 | 1:50.5920 | 1:48.9800 | 1:56.9090 | 1:49.6200 | 1:49.5220 |
| 13th | 8 | Farano / Deletraz / Pinto de Andrade | Oreca 07 Gibson | Tower Motorsport | 1:49.282 | 1:51.8900 | 1:49.2820 | 1:54.0460 | 1:49.4980 | 1:49.8300 |
| 14th | 18 | Merriman / Tilley / Dalziel | Oreca 07 Gibson | Era Motorsport | 1:49.283 | 1:51.5840 | 1:49.2830 | 1:53.5590 | 1:50.5230 | 1:50.3320 |
| 15th | 20 | Andersen / Fjordbach / Scherer | Oreca 07 Gibson | High Class Racing | 1:50.229 | 1:52.5070 | 1:50.2290 | 1:53.3180 | 1:51.7580 | 1:51.8300 |
| 16th | 33 | Barbosa / Jakobsen / Willsey | Ligier JS P320 Nissan | Sean Creech Motorsport | 1:56.878 | 1:59.7810 | 1:57.3470 | 1:58.8280 | 1:57.9060 | 1:56.8780 |
| 17th | 74 | Robinson / Fraga / van Berlo | Ligier JS P320 Nissan | Riley Motorsports | 1:56.971 | 1:57.0480 | 1:57.8050 | no time | 1:57.5170 | 1:56.9710 |
| 18th | 54 | Bennett / Braun / Kurtz | Ligier JS P320 Nissan | CORE Autosport | 1:56.987 | 1:58.7170 | 1:57.7600 | | 1:56.9870 | 1:57.8360 |
| 19th | 36 | Andretti / *Burdon / *Chaves | Ligier JS P320 Nissan | Andretti Autosport | 1:57.083 | 1:57.0830 | 11:18.8770 | 1:59.0110 | 1:58.0400 | 1:58.5190 |
| 20th | 38 | Goldburg / Lindh / Shields | Ligier JS P320 Nissan | Performance Tech Motorsports | 1:57.123 | 1:58.0870 | 1:57.3520 | | 1:57.1230 | 1:58.0670 |
| 21st | 6 | Udell / Gottsacker / de Wilde | Duqueine D08 Nissan | Muehlner Motorsports America | 1:57.610 | 1:57.6100 | 1:58.3120 | 2:00.0340 | 1:57.8810 | 2:00.1570 |
| 22nd | 30 | Balogh / Grist / Dickerson | Ligier JS P320 Nissan | Jr III Racing | 1:57.651 | 2:00.2300 | 1:57.9670 | 2:03.2200 | 1:58.1640 | 1:57.6510 |
| 23rd | 40 | Hanratty / Archer / Vance | Duqueine D08 Nissan | FastMD Racing | 1:57.719 | 1:57.7190 | 2:00.4340 | 1:58.9870 | 1:59.8530 | 1:59.7600 |
| 24th | 7 | Kvamme / Mantella / Bell | Duqueine D08 Nissan | Forty7 Motorsports | 1:58.004 | 2:00.6240 | 1:58.0040 | 1:59.5540 | 1:58.3000 | 1:58.0960 |
| 25th | 13 | Fidani / Wittmer / Kern | Duqueine D08 Nissan | AWA | 1:58.970 | 2:00.4870 | 1:58.9700 | 1:59.3760 | 1:59.8390 | 1:59.6750 |
| 26th | 62 | Serra / Rigon / Cheever | Ferrari 488 GT3 | Risi Competizione | 1:59.414 | 1:59.4140 | 2:01.3990 | 2:01.7380 | 2:00.6830 | 2:01.1110 |
| 27th | 63 | Mapelli / Caldarelli / Bortolotti | Lamborghini Huracán GT3 Evo | TR3 Racing | 1:59.431 | 1:59.4310 | 2:01.5820 | 2:01.5020 | 2:00.8610 | 2:01.6040 |
| 28th | 16 | Hardwick / Robichon / Heylen | Porsche 991 GT3 R | Wright Motorsports | 1:59.763 | 1:59.7630 | 2:02.2530 | 2:19.6730 | 2:01.4040 | 2:01.2080 |
| 29th | 96 | Foley / Auberlen / Dinan | BMW M4 GT3 | Turner Motorsport | 1:59.788 | 1:59.7880 | 2:01.5420 | 2:03.0290 | 2:01.0850 | 2:00.5780 |
| 30th | 57 | Ward / Ellis / Dienst | Mercedes-AMG GT3 Evo | Winward Racing | 1:59.848 | 1:59.8480 | 2:01.8410 | no time | 2:00.9060 | 2:00.0980 |
| 31st | 1 | Sellers / Snow / Johansson | BMW M4 GT3 | Paul Miller Racing | 1:59.898 | 1:59.8980 | 2:01.7230 | 2:04.2670 | 2:01.1230 | 2:01.4440 |
| 32nd | 47 | Lacorte / Sernagiotto / Fuoco | Ferrari 488 GT3 | Cetilar Racing | 1:59.917 | 1:59.9170 | 2:01.2130 | 2:01.3230 | 2:01.4310 | 2:01.7980 |
| 33rd | 3 | Garcia / Taylor / Catsburg | Chevrolet Corvette C8.R GTD | Corvette Racing | 1:59.927 | 1:59.9270 | 2:01.4130 | no time | 2:02.2760 | 2:01.8740 |
| 34th | 23 | Gunn / Riberas / Martin | Aston Martin Vantage GT3 | Heart of Racing Team | 1:59.957 | 1:59.9570 | 2:02.3120 | 2:03.6630 | 2:01.8090 | 2:02.2160 |
| 35th | 9 | Campbell / Jaminet / Nasr | Porsche 991 GT3 R | Pfaff Motorsports | 1:59.982 | 1:59.9820 | 2:02.4730 | 2:03.4420 | 2:01.3000 | 2:01.4720 |
| 36th | 14 | Hawksworth / Barnicoat / Telitz | Lexus RC F GT3 | VasserSullivan | 2:00.002 | 2:00.0020 | 2:01.5050 | 2:02.8140 | 2:01.5930 | 2:02.0290 |
| 37th | 24 | Eng / Wittmann / Yelloly | BMW M4 GT3 | BMW M Team RLL | 2:00.031 | 2:00.0310 | 2:01.3360 | 2:02.2200 | 2:00.5180 | 2:00.7270 |
| 38th | 32 | Skeen / McAleer / Juncadella | Mercedes-AMG GT3 Evo | Gilbert Korthoff Motorsports | 2:00.176 | 2:00.1760 | 2:01.6820 | 2:02.9550 | 2:01.4050 | 2:02.2000 |
| 39th | 21 | Mann / Pérez Companc / Vilander | Ferrari 488 GT3 | AF Corse | 2:00.203 | 2:00.2030 | 2:01.6850 | 2:03.9790 | 2:01.4530 | 2:00.9620 |
| 40th | 25 | De Phillippi / Edwards / Farfus | BMW M4 GT3 | BMW M Team RLL | 2:00.460 | 2:00.4600 | 2:01.7420 | 2:02.1880 | 2:01.1160 | 2:00.9620 |
| 41st | 93 | Harrison / Marcelli / Long | Acura NSX GT3 | Racers Edge Motorsports with WTR | 2:00.605 | 2:00.6050 | 2:02.4720 | no time | 2:02.4950 | 2:01.9130 |
| 42nd | 79 | MacNeil / Andlauer / Picariello | Porsche 991 GT3 R | WeatherTech Racing | 2:00.907 | 2:00.9510 | 2:02.2990 | 2:03.1500 | 2:00.9070 | 2:01.2960 |
| 43rd | 28 | de Quesada / Morad / Götz | Mercedes-AMG GT3 Evo | Alegra Motorsports | 2:00.919 | 2:00.9190 | 2:01.8560 | 2:03.4720 | 2:01.8050 | 2:02.0110 |
| 44th | 59 | Miller / Gallagher / Holton | McLaren 720S GT3 | Crucial Motorsports | 2:01.287 | 2:01.2870 | 2:02.7200 | no time | 2:02.5810 | 2:01.3360 |
| 45th | 97 | MacNeil / Gounon / Engel | Mercedes-AMG GT3 Evo | WeatherTech Racing | 2:01.299 | 2:01.9470 | 2:01.2990 | 2:01.5000 | 2:01.9720 | 2:02.0780 |
| 46th | 66 | Simpson / Bechtolsheimer / Farnbacher | Acura NSX GT3 | Gradient Racing | 2:01.352 | 2:01.3520 | 2:01.9760 | | 2:01.7740 | 2:02.0550 |
| 47th | 12 | Montecalvo / Andrews / Heistand | Lexus RC F GT3 | VasserSullivan | 2:01.457 | 2:01.5360 | 2:02.5180 | 2:02.3690 | 2:01.4570 | 2:01.8730 |
| 48th | 70 | Iribe / Millroy / Pepper | McLaren 720S GT3 | Inception Racing | 2:01.564 | no time | 2:01.7880 | 2:04.5660 | 2:01.5640 | 2:02.2060 |
| 49th | 39 | Megennis / Lewis / Westphal | Lamborghini Huracán GT3 Evo | CarBahn with Peregrine Racing | 2:01.828 | 2:01.9730 | 2:02.7230 | 2:03.7160 | 2:01.8280 | 2:02.3420 |
| 50th | 27 | de Angelis / James / Gamble | Aston Martin Vantage GT3 | Heart of Racing Team | 2:01.961 | 2:02.2710 | 2:01.9610 | 2:04.2540 | 2:03.4550 | 2:03.5040 |
| 51st | 44 | Potter / Lally / Pumpelly | Aston Martin Vantage GT3 | Magnus Racing | 2:01.994 | no time | 2:02.5660 | 2:04.2180 | 2:01.9940 | 2:02.7760 |
| 52nd | 42 | Yount / Conwright / Llarena | Lamborghini Huracán GT3 Evo | NTE/SSR | 2:02.364 | 2:05.8340 | 2:02.8420 | | 2:02.3640 | 2:03.1320 |
| 53rd | 99 | Ferriol / Legge / Wilson | Porsche 991 GT3 R | Team Hardpoint | 2:03.147 | | | | 2:03.7480 | 2:03.1470 |
| 54th | 99T | Ferriol / Legge / Wilson | Porsche 991 GT3 R | Team Hardpoint | 2:03.284 | no time | 2:03.6030 | 2:03.2840 | | |