| 0 | Schiattarella / *Naspetti / *Cecotto | Team Olive Garden (I) | | Ferrari | 550 Maranello | | Ferrari | GTS |
| 00 | Jeannette / Block / Jackson | Gunnar Racing (USA) | | Panoz | LMP-1 Roadster S | | Elan | LMP900 |
| 1 | Pirro / Kristensen / Biela | Audi Sport North America (D) | | Audi | R8 | | Audi | LMP900 |
| 2 | Capello / Pescatori / Herbert | Audi Sport North America (D) | | Audi | R8 | | Audi | LMP900 |
| 3 | Fellows / O'Connell / Gavin | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 4 | Collins / Pilgrim / Fréon | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 5 | Bingham / Rice / MacLeod | Park Place Racing (USA) | | Saleen | S7-R | | Ford | GTS |
| 7 | Collard / Lehto / Bernard | Team Cadillac (USA) | | Cadillac | Northstar LMP 02 | | Cadillac | LMP900 |
| 8 | Angelelli / Taylor / Tinseau | Team Cadillac (USA) | | Cadillac | Northstar LMP 02 | | Cadillac | LMP900 |
| 11 | Kane / Knight / Lally / *Hawkins | KnightHawk Racing, LLC (USA) | | Lola | EX257 | | AER | LMP675 |
| 12 | Kox / Hill / Hugenholtz | Spyker Squadron (NL) | | Spyker | C8 Double 12R | | BMW | GT |
| 16 | Weaver / Leitzinger / Forbes-Robinson | Dyson Racing Team, Inc (USA) | | Riley & Scott | Mk III | Series 2 | Ford | LMP900 |
| 17 | Maxwell / Duno / Graham | MBD Sportscar (USA) | | Panoz | LMP07 | | Mugen | LMP900 |
| 18 | de Radigues / Lambert / Sutherland | MBD Sportscar (USA) | | Panoz | LMP07 | | Mugen | LMP900 |
| 19 | Lupberger / Bell / Kolby | Team Ascari (GB) | | Ascari | KZR-1 | | Judd | LMP900 |
| 20 | Schroeder / Dyson / Dyson | Dyson Racing Team Inc (USA) | | Riley & Scott | Mk III | | Ford | LMP900 |
| 21 | Collins / Vann / Wilson | Team Ascari (GB) | | Ascari | KZR-1 | | Judd | LMP900 |
| 22 | Bernhard / Bergmeister / Lieb | Alex Job Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 23 | Maassen / Luhr | Alex Job Racing (USA) | Alex Job | Porsche | 996 GT3-RS | | Porsche | GT |
| 24 | Fergus / Downing / Terada | AutoExe Motorsports (J) | | WR | LMP-02 | (AutoExe) | Mazda | LMP675 |
| 25 | Slater / Pickering / *Brun / *Konrad | Konrad Motorsport (D) | | Saleen | S7-R | | Ford | GTS |
| 26 | Seiler / Borcheller / Konrad / *Slater | Konrad Motorsport (D) | | Saleen | S7-R | | Ford | GTS |
| 27 | Theys / *Lienhard / *Baldi | Doran Lista Racing (USA) | | Dallara | SP1 | | Judd | LMP900 |
| 28 | Daoudi / de Fournoux / Smith | Welter Racing (F) | | WR | LM 2001 | | Peugeot | LMP675 |
| 29 | Earle / Hayden / *Griffiths | Sebah Automotive Limited (GB) | Hugh Hayden | Porsche | 996 GT3-R | | Porsche | GT |
| 30 | Macaluso / Neuhaus / Brickell | InterSport (USA) | | Lola | B2K/10 | B | Judd | LMP900 |
| 31 | Montermini / *Argetsinger / *Hunter-Reay / *Garbagnati | JMB Racing (F) | | Ferrari | 360 Modena | N-GT | Ferrari | GT |
| 32 | Negri / Garbagnati / Vannini | JMB Racing (F) | | Ferrari | 360 Modena | N-GT | Ferrari | GT |
| 33 | Kelleners / *Franchitti | MSB Motorsport (USA) | | Ferrari | 360 Modena | GT | Ferrari | GT |
| 36 | Goossens / Smith / Matthews | Riley & Scott Racing (USA) | | Riley & Scott | Mk III C | | Elan | LMP900 |
| 37 | Field / Dayton / Durand | Intersport (USA) | | Lola | EX257 | | AER | LMP675 |
| 38 | Wallace / Johansson / Lammers | Champion Racing (USA) | Dave Maraj | Audi | R8 | | Audi | LMP900 |
| 40 | Jones / Jones / Jones | Racing Organisation Course (F) | | Reynard | 2KQ | | VW | LMP675 |
| 41 | Delétraz / Smithson / Pillon | Noel Del Bello Racing (F) | | Reynard | 2KQ | | VW | LMP675 |
| 42 | Schultheis / Willingham / Kester | Orbit (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 43 | Borkowski / Baron / Hindery | Orbit (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 44 | Gregg / Bunting / Weickardt | American Viperacing (USA) | | Dodge | Viper | GTS-R | Dodge | GTS |
| 45 | Lewis / Goldrich / Fairbanks | American Viperacing (USA) | | Dodge | Viper | GTS-R | Dodge | GTS |
| 46 | Hezemans / Kumpen / Cappellari | Team Carsport Holland (NL) | | Chrysler | Viper | GTS-R | Chrysler | GTS |
| 50 | Magnussen / Brabham / *van de Poele | Panoz Motor Sports (USA) | Don Panoz | Panoz | LMP 01 | | Elan | LMP900 |
| 51 | Herta / Auberlen / Donohue | Panoz Motor Sports (USA) | Don Panoz | Panoz | LMP 01 | | Elan | LMP900 |
| 52 | Plumb / Bagnall / Collin | Seikel Motorsport (D) | Peter Seikel | Porsche | 996 GT3-RS | | Porsche | GT |
| 53 | Caffi / Riccitelli / Rosa | Seikel Motorsport (D) | Peter Seikel | Porsche | 996 GT3-RS | | Porsche | GT |
| 55 | McMurry / *Willman / *Ehret | Team Bucknum Racing (USA) | | Pilbeam | MP84 | | Nissan | LMP675 |
| 56 | Bucknum / *Downs / *Ziegelman | Team Bucknum Racing (USA) | | Pilbeam | MP84 | | Nissan | LMP675 |
| 57 | Dumas / *Amorim / *Fertl | Freisinger Motorsport (D) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 58 | Vance / Forgeois / Southard | Freisinger Motorsport (D) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 60 | Babini / Anapoli / Liddell | P.K. Sport Ltd. (GB) | Mike Pickup | Porsche | 996 GT3-RS | | Porsche | GT |
| 61 | Alexander / Demeroutis / Masarati | P.K. Sport Ltd. (GB) | | Porsche | 996 GT3-R | | Porsche | GT |
| 65 | Rymer / Youles / Mowlem | Harlow Motorsport - Ricardo (GB) | | Porsche | 996 GT3-R | | Porsche | GT |
| 66 | Buckler / Schrom / *Law | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RS | | Porsche | GT |
| 67 | Schumacher / Nagel / Pace | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RS | | Porsche | GT |
| 69 | Wankum / Foster / Bundy | Kyser Racing (CDN) | Kye Wankum | Lola | B2K/40 | | Nissan | LMP675 |
| 77 | Menu / Rydell / Enge | Prodrive (GB) | | Ferrari | 550 Maranello | GTS | Ferrari | GTS |
| 79 | Murry / Jackson / Fitzgerald | J3 Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 83 | Erdos / McKellar / Johnson | Graham Nash Motorsport (GB) | | Saleen | S7-R | | Ford | GTS |
| 85 | Clément / Ahrlé / Simmenauer | 917 Racing Team (F) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 86 | Bouchut / Vosse | Larbre Competition Chereau (F) | | Chrysler | Viper | GTS-R | Chrysler | GTS |
| 87 | Mirro / *Forgeois / *O'Born | Sezio Florida Racing Team (USA) | | Norma | M2000 | -02 | Ford | LMP900 |
| 89 | Veilleux / Julien / Merzon | Porschehaus Racing (CDN) | | Lola | B2K/40 | | Nissan | LMP675 |
| 99 | Wilson / Gleason / Dawson / *Gooding | Cirtek Motorsport (USA) | | Porsche | 996 GT3-R | | Porsche | GT |