| 01 | Cadillac DPi-V.R | Cadillac Racing | black/grey (+red/white) | CADILLAC V-PERFORMANCE ACADEMY | Michelin | closed | mid |
| 02 | Cadillac DPi-V.R | Cadillac Racing | black/red (+grey/white) | CADILLAC ACCESSORIES | Michelin | closed | mid |
| 1 | BMW M4 GT3 | Paul Miller Racing | blue/black/white/red | QUARTZ/uis/Paul Miller Auto Group | Michelin | closed | front |
| 3 | Chevrolet Corvette C8.R GTD | Corvette Racing | yellow/grey | Mobil 1/Sirius XM | Michelin | closed | mid |
| 5 | Cadillac DPi-V.R | JDC Miller MotorSports | grey/gold (+black/white) | Mustang Sampling/galp/wynn's | Michelin | closed | mid |
| 6 | Duqueine D08 Nissan | Muehlner Motorsports America | blue/white | H&R | Michelin | closed | mid |
| 7 | Duqueine D08 Nissan | Forty7 Motorsports | grey/blue | | Michelin | closed | mid |
| 8 | Oreca 07 Gibson | Tower Motorsport | black/orange/white | TOWER EVENTS | Michelin | closed | mid |
| 9 | Porsche 991 GT3 R | Pfaff Motorsports | red/silver/grey | driveway/MOTUL/HAGERTY | Michelin | closed | rear |
| 10 | Acura ARX-05 | Konica Minolta Acura ARX-05 | blue/black (+silver) | KONICA MINOLTA/ACURA | Michelin | closed | mid |
| 11 | Oreca 07 Gibson | PR1 Mathiasen Motorsports | blue/white/grey | FEAR THE TAFS/#ENDALZ | Michelin | closed | mid |
| 12 | Lexus RC F GT3 | VasserSullivan | yellow/black | SealMaster/mark levinson/molex | Michelin | closed | front |
| 13 | Duqueine D08 Nissan | AWA | yellow/black (+red) | ORLANDOCORP.COM/SONIC | Michelin | closed | mid |
| 14 | Lexus RC F GT3 | VasserSullivan | yellow/black | SealMaster/mark levinson/molex | Michelin | closed | front |
| 16 | Porsche 991 GT3 R | Wright Motorsports | blue/black (+white) | 1st phorm/MOUNTAIN MOTORSPORTS/UNA VIDA | Michelin | closed | rear |
| 18 | Oreca 07 Gibson | Era Motorsport | blue/grey/white | MECHANIX WEAR/CONTROL | Michelin | closed | mid |
| 20 | Oreca 07 Gibson | High Class Racing | red/white/black | polar handtools/MASCOT WORKWEAR/STOBAG | Michelin | closed | mid |
| 21 | Ferrari 488 GT3 | AF Corse | red (+white) | rotiform | Michelin | closed | mid |
| 23 | Aston Martin Vantage GT3 | Heart of Racing Team | blue (+yellow) | THE HEART OF RACING | Michelin | closed | front |
| 25 | BMW M4 GT3 | BMW M Team RLL | red/black/white/grey | MOTUL/BMW of North America/H&R/Global Medical Response | Michelin | closed | front |
| 27 | Aston Martin Vantage GT3 | Heart of Racing Team | blue (+yellow) | THE HEART OF RACING | Michelin | closed | front |
| 29 | Oreca 07 Gibson | Racing Team Nederland | yellow/black | JUMBO/VAN WUNEN | Michelin | closed | mid |
| 30 | Ligier JS P320 Nissan | Jr III Racing | yellow/black/red | airbnb/S2 Cyber | Michelin | closed | mid |
| 31 | Cadillac DPi-V.R | Whelen Engineering Racing | red/white (+black) | WHELEN/LUCAS OIL/CORE/TEAMFOX | Michelin | closed | mid |
| 32 | Mercedes-AMG GT3 | Team Korthoff Motorsports | silver/black (+blue) | Herb Korthoff | Michelin | closed | front |
| 33 | Ligier JS P320 Nissan | Sean Creech Motorsport | white/blue/red | Focal One/ALTA/EXELIXIS | Michelin | closed | mid |
| 36 | Ligier JS P320 Nissan | Andretti Autosport | grey/white (+green) | GALLANT/MI/Window World | Michelin | closed | mid |
| 38 | Ligier JS P320 Nissan | Performance Tech Motorsports | red/black/grey | CARDIO ACCESS/COPEC/emasa | Michelin | closed | mid |
| 39 | Lamborghini Huracán GT3 Evo | CarBahn with Peregrine Racing | grey/green/black | Optimizely/Accel/Menlo/AERO | Michelin | closed | mid |
| 40 | Duqueine D08 Nissan | FastMD Racing | black/red | FASTMD HEALTHCARE/BRANDLIVE/TRACK KING | Michelin | closed | mid |
| 42 | Lamborghini Huracán GT3 | NTE/SSR | blue/white | SOUTHWEST FUNDING | Michelin | closed | mid |
| 44 | Aston Martin Vantage GT3 | Magnus Racing | black (+green/white) | | Michelin | closed | front |
| 47 | Ferrari 488 GT3 | Cetilar Racing | blue (+green) | Cetilar | Michelin | closed | mid |
| 48 | Cadillac DPi-V.R | Ally Cadillac | white/purple/pink | ally/LUCAS OIL | Michelin | closed | mid |
| 52 | Oreca 07 Gibson | PR1 Mathiasen Motorsports | purple/pink/orange (+white) | wynn's/4HORSEMEN/rainX | Michelin | closed | mid |
| 54 | Ligier JS P320 Nissan | CORE Autosport | orange/white/blue/grey | FLEX-BOX/CROWDSTRIKE | Michelin | closed | mid |
| 57 | Mercedes-AMG GT3 | Winward Racing | black/grey/blue | TECHEMET/FIRST HORIZON/Mobil 1 | Michelin | closed | front |
| 58 | Ligier JS P320 Nissan | MLT Motorsports | white/orange/purple (+black) | MICHAEL Thompson/TWD | Michelin | closed | mid |
| 59 | McLaren 720S GT3 | Crucial Motorsports | orange | Belle Haven/JDRF/FIRM | Michelin | closed | mid |
| 60 | Acura ARX-05 | Meyer Shank Racing W/Curb-Agajanian | pink/blue/white | AutoNation/SiriusXM/ARCTIC WOLF | Michelin | closed | mid |
| 62 | Ferrari 488 GT3 | Risi Competizione | red | PENNZOIL/Ferrari of HOUSTON/1st Phorm/rotiform | Michelin | closed | mid |
| 66 | Acura NSX GT3 | Gradient Racing | blue/black/white | INVEST CAYMAN/UNIT NUTRITION/ACURA/HPD | Michelin | closed | mid |
| 70 | McLaren 720S GT3 | Inception Racing | black/red | Pedal Mafia/pyure/AVORAK/UNCOMMON SENSE | Michelin | closed | mid |
| 74 | Ligier JS P320 Nissan | Riley Motorsports | blue/orange | 74 RANCH RESORT/MOTUL | Michelin | closed | mid |
| 79 | Mercedes-AMG GT3 | WeatherTech Racing | white (+red/blue) | WeatherTech | Michelin | closed | front |
| 81 | Oreca 07 Gibson | DragonSpeed USA | white/blue (+red) | FLEX-BOX/FORMULA IMPORTS/MOTUL | Michelin | closed | mid |
| 96 | BMW M4 GT3 | Turner Motorsport | yellow/blue | TURNER/H&R/LIQUI MOLY | Michelin | closed | front |
| 99 | Porsche 991 GT3 R | Team Hardpoint | white/red/black | GRIDRIVAL/GNARLY | Michelin | closed | rear |