| 0 | Naspetti / Schiattarella / Cecotto | Team Olive Garden (I) | | Ferrari | 550 Maranello | | Ferrari | GTS |
| 01 | Herta / *Dumas / *Stirling | Team Nasamax (GB) | | Reynard | 01Q | | Ford | LMP900 |
| 03 | Foster / Nyberg / Skelton | Hyper Sport (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 03T | | Hyper Sport (USA) | | Panoz | Esperante | GTLM | Elan | GT |
| 07 | Daoudi / Lechner, Jr. / *Fomenko | RWS-Yukos Motorsport (D) | | Porsche | 996 GT3-R | | Porsche | GT |
| 1 | Biela / Werner / Peter | Infineon Team Joest (D) | | Audi | R8 | | Audi | LMP900 |
| 2 | Konrad / Nearn / Seiler | Konrad Motorsport (D) | | Saleen | S7-R | | Ford | GTS |
| 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 | Campbell-Walter / *McKellar | Lister Storm Racing (GB) | Brian Lister | Lister | Storm LMP | | Chevrolet | LMP900 |
| 7 | Smith / Kristensen / Capello | Team Bentley (GB) | | Bentley | Speed 8 | | Bentley | LMP900 |
| 8 | Herbert / Brabham / Blundell | Team Bentley (GB) | | Bentley | Speed 8 | | Bentley | LMP900 |
| 9 | Kane / Salo / McCarthy | Audi Sport UK (GB) | | Audi | R8 | | Audi | LMP900 |
| 10 | Beretta / Papis / Jeannette | JML (USA) | | Panoz | LMP 01 | | Elan | LMP900 |
| 11 | Maxwell / Graham / Leuenberger | JML (USA) | | Panoz | LMP 01 | | Elan | LMP900 |
| 12 | Lewis / Drissi / Cosmo | American Spirit Racing (USA) | | Riley & Scott | Mk III C | | Lincoln | LMP900 |
| 15 | Shimoda / Nielsen | RN Motorsports (GB) | | DBA | 4-03S | | Zytek | LMP675 |
| 16 | Weaver / Leitzinger / *Wallace | Dyson Racing (USA) | | Lola | EX257 | | AER | LMP675 |
| 17 | Hezemans / *Kumpen | Carsport America (USA) | Mike Hezemans | Pagani | Zonda | GR | Mercedes | GTS |
| 18 | Devlin / Workman / *Paterson | Marshall Cooke Racing (USA) | | Lola | B2K/40 | | Ford | LMP675 |
| 20 | de Radigues / Block / Dyson | Dyson Racing (USA) | | Lola | EX257 | | AER | LMP675 |
| 23 | Maassen / Luhr | Alex Job Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 24 | Bernhard / Bergmeister | Alex Job Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 27 | Theys / van de Poele / Lienhard | Doran Lista Racing (USA) | | Dallara | SP1 | | MG | LMP900 |
| 28 | Grégoire / Babini / Pescatori | JMB Racing USA (USA) | | Ferrari | 360 Modena | N-GT | Ferrari | GT |
| 29 | Earle / Garbagnati / Manfredi | JMB Racing USA (USA) | | Ferrari | 360 Modena | N-GT | Ferrari | GT |
| 30 | Field / Sutherland / Macaluso | Intersport Racing (USA) | | Lola | B2K/10 | B | MG | LMP900 |
| 31 | Mowlem / Jönsson / Stanton / *Petersen | White Lightning (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 33 | Pumpelly / Lally / Ivankovich | ZIP Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 34 | Franchitti / McGarrity / *Bennett | Risi Competizione (USA) | | Ferrari | 360 Modena | GT | Ferrari | GT |
| 35 | Kelleners / Lazzaro / *Borcheller | Risi Competizione (USA) | | Ferrari | 360 Modena | GT | Ferrari | GT |
| 36 | Goossens / Magnussen / Matthews | Jim Matthews Racing (USA) | | Riley & Scott | Mk III C | | Ford | LMP900 |
| 37 | Field / Dayton / Durand | Intersport Racing (USA) | | Lola | EX257 | | AER | LMP675 |
| 38 | Pirro / Lehto / Johansson | Champion Racing (USA) | Dave Maraj | Audi | R8 | | Audi | LMP900 |
| 39 | Assentato / Longhi / Sherman | ZIP Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 40 | Said / Jones / de Quesada | Alegra Motorsports (USA) | | BMW | M3 | E46 GT | BMW | GT |
| 41 | Barff / Hay / Stanton | DeWalt Racesport Salisbury (GB) | | TVR | Tuscan | T400R | TVR | GT |
| 42 | Policastro / Policastro, Jr. / Fitzgerald | Orbit Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 43 | Lieb / Baron / *Hindery | Orbit Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 48 | Simon / Hugenholtz / van Schoote | Spyker Squadron (NL) | | Spyker | C8 Double 12R | | BMW | GT |
| 52 | Collin / Lloyd / Shep | Seikel Motorsport (D) | Peter Seikel | Porsche | 996 GT3-RS | | Porsche | GT |
| 53 | Caffi / Rosa / Chiesa | Seikel Motorsport (D) | Peter Seikel | Porsche | 996 GT3-RS | | Porsche | GT |
| 56 | Bucknum / Willman / *McMurry | Team Bucknum Racing (USA) | | Pilbeam | MP91 | | Willman | LMP675 |
| 60 | Liddell / Masarati / *Warnock | P.K. Sport (GB) | Mike Pickup | Porsche | 996 GT3-R | | Porsche | GT |
| 61 | Donaldson / Hayden / Fisken | P.K. Sport (GB) | | Porsche | 996 GT3-R | | Porsche | GT |
| 63 | Zacharias / Davis / Lewis / *Whitehead | ACEMCO Motorsports (USA) | | Ferrari | 360 Modena | GT | Ferrari | GT |
| 66 | Buckler / Pace / Salazar | The Racer's Group (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 67 | Schrom / Ehret / Rice | The Racer's Group (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 68 | Wagner / Bunting / Gleason | The Racer's Group (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 71 | Belloc / Altenburg / Weickardt | Carsport America (USA) | | Dodge | Viper | GTS-R | Dodge | GTS |
| 72 | | DeWalt Racesport Salisbury (GB) | | Morgan | Aero 8 | GTN | | GT |
| 77 | Andrews / Keen / Oberto | Taurus Sports Racing (GB) | | Lola | B2K/10 | B | Judd | LMP900 |
| 78 | Forgeois / Clark / Vance | T2M Motorsport (D) | | Porsche | 996 GT3-R | | Porsche | GT |
| 79 | Murry / Cunningham / *Jackson | J-3 Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 80 | Turner / Davidson / Burt | Veloqx Prodrive Racing (GB) | | Ferrari | 550 Maranello | GTS | Ferrari | GTS |
| 83 | Erdos / Chaves / Pickering | Graham Nash Motorsport (GB) | | Saleen | S7-R | | Ford | GTS |
| 87 | Roussel / James / *Ziegelman | Sezio Florida Racing Team (USA) | | Norma | M2000 | -02 | Ford | LMP900 |
| 88 | Enge / Kox / Davies | Veloqx Prodrive Racing (GB) | | Ferrari | 550 Maranello | GTS | Ferrari | GTS |