| 01 | Cadillac V-Series.R | Cadillac Racing | yellow/black (+red) | CADILLAC | Michelin | Mobil 1 | closed | mid |
| 1 | BMW M4 GT3 | Paul Miller Racing | grey/red/silver | IHeart RADIO/UIS/Paul Miller Auto Group | Michelin | | closed | front |
| 3 | Chevrolet Corvette C8 Z06 GT3.R | Corvette Racing by Pratt Miller Motorsports | yellow/black | OSHKOSH/Mobil 1/Sirius XM | Michelin | | closed | mid |
| 4 | Chevrolet Corvette C8 Z06 GT3.R | Corvette Racing by Pratt Miller Motorsports | yellow/black | OSHKOSH/Mobil 1/Sirius XM | Michelin | | closed | mid |
| 5 | Porsche 963 | Proton Competition Mustang Sampling | black (+gold) | Mustang Sampling/F.A.T. | Michelin | Motul | closed | mid |
| 6 | Porsche 963 | Porsche Penske Motorsport | red/white (+black) | PORSCHE 963/PENSKE/Ansys/TAG HEUER/HELLER | Michelin | | closed | mid |
| 7 | Porsche 963 | Porsche Penske Motorsport | red/white/black | PORSCHE 963/PENSKE/Ansys/TAG HEUER/HELLER | Michelin | | closed | mid |
| 9 | McLaren 720S GT3 Evo | Pfaff Motorsports | orange/black (+blue) | driveway.com/MOTUL/MOTOMASTER/McLaren Toronto | Michelin | | closed | mid |
| 10 | Acura ARX-06 | Wayne Taylor Racing with Andretti | blue/black | KONICA MINOLTA/ACURA/HRC | Michelin | | closed | mid |
| 14 | Lexus RC F GT3 | Vasser Sullivan | black/yellow | SealMaster/Mark Levinson/molex | Michelin | | closed | front |
| 15 | Lexus RC F GT3 | Vasser Sullivan | black/yellow | SealMaster/Mark Levinson/molex | Michelin | | closed | front |
| 23 | Aston Martin Vantage GT3 Evo | Heart of Racing Team | blue (+yellow) | THE HEART OF RACING | Michelin | | closed | front |
| 24 | BMW M Hybrid V8 | BMW M Team RLL | white/blue/red | BMW of North America/Puma | Michelin | | closed | mid |
| 25 | BMW M Hybrid V8 | BMW M Team RLL | white/blue/red | BMW of North America/Puma | Michelin | | closed | mid |
| 31 | Cadillac V-Series.R | Whelen Cadillac Racing | red/black (+white/yellow) | WHELEN/CADILLAC | Michelin | Mobil 1 | closed | mid |
| 35 | Ferrari 296 GT3 | Conquest Racing | yellow/black (+pink) | RACE TO INSPIRE | Michelin | | closed | mid |
| 40 | Acura ARX-06 | Wayne Taylor Racing with Andretti | red/black | DEX Imaging/ACURA/HRC/GAINBRIDGE | Michelin | | closed | mid |
| 64 | Ford Mustang GT3 | Ford Multimatic Motorsports | yellow/red/blue (+white) | FORD PERFORMANCE/Multimatic | Michelin | | closed | front |
| 65 | Ford Mustang GT3 | Ford Multimatic Motorsports | yellow/red/blue (+white) | FORD PERFORMANCE/Multimatic | Michelin | | closed | front |
| 77 | Porsche 992 GT3 R | AO Racing | green (+gold) | Multimatic | Michelin | | closed | rear |
| 85 | Porsche 963 | JDC-Miller MotorSports | yellow (+black) | JDC/PORSCHE/TROFI PACK/S3s/wiha | Michelin | Motul | closed | mid |