| 0 | Naspetti / Camathias / *Schiattarella | Team Olive Garden (I) | | Ferrari | 550 Maranello | | Ferrari | GTS |
| 03 | Foster / Nyberg / Skelton | Hyper Sport (USA) | | Panoz | Esperante | GTLM | Elan | GT |
| 08 | Lammers / Policand / Dor | Prodrive (GB) | | Ferrari | 550 Maranello | GTS | Ferrari | GTS |
| 1 | Biela / Werner | Infineon Team Joest (D) | | Audi | R8 | | Audi | LMP900 |
| 3 | Fellows / O'Connell / Fréon | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 4 | Gavin / Collins / Pilgrim | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 6 | Auberlen / Stuck / Said | Yokohama/ADVAN (USA) | | BMW | M3 | E46 GT | BMW | GT |
| 10 | Beretta / Saelens / Papis | JML Team Panoz (USA) | | Panoz | LMP 01 | | Elan | LMP900 |
| 11 | Maxwell / Jeannette / Leuenberger | JML Team Panoz (USA) | | Panoz | LMP 01 | | Elan | LMP900 |
| 12 | Lewis / Drissi / Paterson | American Spirit Racing (USA) | | Riley & Scott | Mk III C | | Lincoln | LMP900 |
| 16 | Weaver / *Leitzinger / *Wallace | Dyson Racing Team, Inc. (USA) | | Lola | EX257 | | AER | LMP675 |
| 18 | Davis / Workman / Bradley | Essex Racing (USA) | | Lola | B2K/40 | | Nissan | LMP675 |
| 20 | de Radigues / Block / Dyson | Dyson Racing Team, Inc. (USA) | | Lola | EX257 | | AER | LMP675 |
| 23 | Maassen / Luhr | Alex Job Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 24 | Bernhard / Bergmeister / Dumas | Alex Job Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 28 | Grégoire / Earle / Shearer | JMB Racing USA (USA) | | Ferrari | 360 Modena | N-GT | Ferrari | GT |
| 30 | Field / Durand / Oberto | Intersport Racing (USA) | Jon Field | Riley & Scott | Mk III C | | Ford | LMP900 |
| 31 | Mowlem / *Stanton / *Petersen | White Lightning/Petersen Motorsports (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 35 | Kelleners / Lazzaro | Risi Competizione (USA) | | Ferrari | 360 Modena | GT | Ferrari | GT |
| 37 | Field / Dayton / Connor | Intersport Racing (USA) | | Lola | B01/60 | | Judd | LMP675 |
| 38 | Lehto / Herbert / *Johansson | Team ADT Champion Racing (USA) | Dave Maraj | Audi | R8 | | Audi | LMP900 |
| 42 | Pobst / Policastro, Jr. / Policastro | Orbit Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 43 | Baron / Rockenfeller / Hindery | Orbit Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 52 | Burgess / Collin / Bagnall | Seikel Motorsport (D) | Peter Seikel | Porsche | 996 GT3-RS | | Porsche | GT |
| 56 | Willman / Rudolph / McMurry | Team Bucknum Racing (USA) | | Pilbeam | MP91 | | Willman | LMP675 |
| 60 | Liddell / Caffi / Warnock | P.K. Sport (GB) | Mike Pickup | Porsche | 996 GT3-R | | Porsche | GT |
| 61 | Rice / Kapudija / Groom | P.K. Sport (GB) | | Porsche | 996 GT3-R | | Porsche | GT |
| 63 | Law / Lewis / Borcheller | Acemco Motorsports, LLC (USA) | | Ferrari | 360 Modena | GT | Ferrari | GT |
| 64 | Katz / Terada / Downing | Downing/Atlanta, Inc. (USA) | | WR | LMP-02 | | Mazda | LMP675 |
| 66 | Buckler / Wagner / Long | The Racer's Group (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 67 | Nastasi / Zwart / *Donner | The Racer's Group (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 68 | Gleason / Ehret / Bunting | The Racer's Group (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 71 | Belloc / Weickardt / Cayrolle | Carsport America (USA) | | Dodge | Viper | GTS-R | Dodge | GTS |
| 79 | Murry / Jackson / Cunningham | J-3 Racing, Inc. (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 80 | Brabham / Magnussen / Davidson | Prodrive (GB) | | Ferrari | 550 Maranello | GTS | Ferrari | GTS |
| 88 | Menu / Kox / Enge | Prodrive (GB) | | Ferrari | 550 Maranello | GTS | Ferrari | GTS |
| 89 | Negri / Frisselle / *Pumpelly | Inline Cunningham Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |