| 0 | van de Poele / Saelens / Enge | Team Rafanelli SRL (I) | | Riley & Scott | Mk III | | Judd | LMP |
| 02 | Murry / Mowlem / *Ruther | Reiser Callas Rennsport (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 03 | Willingham / Stanton / Reiser | Reiser Callas Rennsport (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 04 | Morton / Graham / Jones / *Maxwell | CJ Motorsport (CDN) | John Graham | Porsche | 993 GT2 | R | Porsche | GTS |
| 07 | Tremblay / Marshall / Marshall / Law | G&W Motorsports (USA) | | Porsche | 993 GT2 | Evo | Porsche | GT |
| 1 | Brabham / Bernard / *Graf | Panoz Racing (USA) | Don Panoz | Panoz | GTR-1 | | Ford | LMP |
| 2 | O'Connell / Magnussen / Nielsen | Panoz Racing (USA) | Don Panoz | Panoz | GTR-1 | | Ford | LMP |
| 3 | Fellows / Paul, Jr. / Kneifel | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 4 | Heinricy / Pilgrim / Sharp | Riley & Scott Inc. (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 5 | Whittington / Haywood / Whittington | Whittington Brothers, Inc. (USA) | | Riley & Scott | Mk III | | Ford | LMP |
| 7 | Simo / Cunningham / Van Overbeek | Prototype Technology Group (USA) | | BMW | M3 | E36 | BMW | GT |
| 8 | Schubot / Camferdam / Dayton | Transatlantic Racing (USA) | | Riley & Scott | Mk III | | Ford | LMP |
| 10 | Said / Stuck / Cunningham | Prototype Technology Group (USA) | | BMW | M3 | E36 | BMW | GT |
| 11 | Angelelli / *de Radigues / *Lazzaro | Doyle-Risi Racing (USA) | | Ferrari | 333 SP | | Ferrari | LMP |
| 12 | Caffi / Fangio II / Taylor / Angelelli | Doyle-Risi Racing (USA) | | Ferrari | 333 SP | | Ferrari | LMP |
| 15 | Bentley / Bingham / Duez | Hybrid R&D (USA) | | Riley & Scott | Mk III | | Ford | LMP |
| 16 | Weaver / Wallace / Schroeder | Dyson Racing (USA) | | Riley & Scott | Mk III | | Ford | LMP |
| 17 | Conte / Lambert / *Holt | Aasco Performance (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 18 | Davies / Dollahite / Bundy | Dollahite Racing (USA) | | Ferrari | 333 SP | | Ferrari | LMP |
| 20 | Leitzinger / Forbes-Robinson / Weaver / *Dyson | Dyson Racing (USA) | | Riley & Scott | Mk III | | Ford | LMP |
| 22 | Pobst / Fitzgerald / MacNeil | Alex Job Racing (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 23 | Collins / Wagner / Havens | Alex Job Racing (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 25 | Hofer / Riccitelli / Blieninger / Jodexnis | RWS Motorsport (D) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 26 | Auberlen / Bscher / Soper | Price & Bscher (GB) | | BMW | V12 LM | | BMW | LMP |
| 27 | Theys / Baldi / Lienhard | Doran Enterprises (USA) | | Ferrari | 333 SP | | Ferrari | LMP |
| 28 | Field / Jones / Goodwin | Intersport Racing (USA) | | Lola | B98/10 | | Ford | LMP |
| 29 | Mirro / Brown / Brickell / Petery | Intersport Racing (USA) | | Riley & Scott | Mk III | | Ford | LMP |
| 31 | Fairbanks / Dullum / Baumann | Genesis Racing (USA) | | Riley & Scott | Mk III | | Ford | LMP |
| 33 | Richter / Wlazik / Gallade | Gallade (D) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 36 | Kendall / Matthews / Dismore | Doran Enterprises (USA) | | Ferrari | 333 SP | | Ferrari | LMP |
| 38 | Boutsen / Wollek / Müller | Champion Racing (USA) | | Porsche | 911 GT1 | Evo | Porsche | LMP |
| 39 | Earle / Snyder / Ziegelman / Mitchum | Broadfoot Racing (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 42 | Lehto / Kristensen / Müller | BMW Motorsport (D) | | BMW | V12 LMR | | BMW | LMP |
| 43 | Dalmas / Martini / Winkelhock | BMW Motorsport (D) | | BMW | V12 LMR | | BMW | LMP |
| 44 | Fréon / Terada | Autoexe Motorsports (J) | | Riley & Scott | Mk III | Series 2 / Autoexe LMP99 | Ford | LMP |
| 46 | Shalala / Malnik / Toennis / Rollwitz | Team Transenergy | | Porsche | 964 Carrera | RSR | Porsche | GT |
| 48 | Kaufmann / Ligonnet / Stewart | Freisinger Motorsport (D) | | Porsche | 993 GT2 | | Porsche | GTS |
| 49 | Irmgratz / Jurasz / Creger | Freisinger Motorsport (D) | | Porsche | 993 GT2 | | Porsche | GTS |
| 50 | Johnson / Hoke / McGlynn | Johnson Autosport (USA) | J. Robert Johnson | Porsche | 911 Carrera RSR | | Porsche | GTS |
| 54 | Hayner / Kester / Neuman / Drendel | Bell Motorsports (USA) | James Bell | BMW | M3 | E36 | BMW | GT |
| 55 | Johnson / Borcheller / *Saleen / *Law | Saleen/Allen Speedlab (USA) | | Saleen | Mustang | SR | Ford | GTS |
| 56 | Snow / Snow / Huisman | Martin Snow Racing (USA) | Martin Snow | Porsche | 993 GT2 | R | Porsche | GTS |
| 60 | Wilson / Moser | Kopf Precision (USA) | | Keiler | KII | | Ford | LMP |
| 61 | Slater / Kitchak / Hezemans | Konrad Motorsport (D) | Franz Konrad | Porsche | 993 GT2 | | Porsche | GTS |
| 62 | Grupp / Smith / Spencer | Downing/Atlanta (USA) | | Kudzu | DLM | | Mazda | LMP |
| 63 | Downing / Ronson / Pelke | Downing/Atlanta (USA) | Jim Downing | Kudzu | DLY | | Mazda | LMP |
| 66 | Lammers / Konrad / Hubman | Konrad Motorsport (D) | Franz Konrad | Lola | B98/10 | | Lotus | LMP |
| 70 | Gabel / de Quesada / Colombo / *White | Alegra Motorsport (USA) | | Porsche | 993 Carrera | RSR | Porsche | GT |
| 71 | Pilla / Mazzuoccola / *Kicak / *Montgomery | DM Motorsports (USA) | | Porsche | 993 GT2 | Evo | Porsche | GTS |
| 72 | Baron / McCormick / Hindery / Buitoni | Bell Motorsports (USA) | | BMW | M3 | | BMW | GT |
| 73 | Wheeler / Refenning / Refenning / Vargo | Auto Sport South, Inc. (USA) | Jack Lewis | Porsche | 993 Carrera | RSR | Porsche | GT |
| 74 | Baldwin / Robinson / Hoerr | Robinson Racing (USA) | | Riley & Scott | Mk III | | Chevrolet | LMP |
| 76 | Argetsinger / Polidori / *McCaig | Team ARE (USA) | Richard Raimist | Porsche | 993 Carrera | RSR | Porsche | GT |
| 77 | Alboreto / Capello / Johansson | Audi Sport Team Joest (D) | | Audi | R8R | | Audi | LMP |
| 78 | Pirro / Biela / McCarthy | Audi Sport Team Joest (D) | | Audi | R8R | | Audi | LMP |
| 83 | Hürtgen / Haupt / Brown | ARBJH Development | | Porsche | 993 GT2 | | Porsche | GTS |
| 88 | Varde / Ralston / Alexander | Vanderhoof Racing (USA) | Dennis Aase | Porsche | 993 Carrera | RSR | Porsche | GT |
| 95 | Schroeder / Halsmer / *Volk / *Waddell | TRV Motorsport (USA) | | Riley & Scott | Mk III | | Chevrolet | LMP |
| 97 | Zabinski / Lewis / Rice | Team Cascandia (USA) | | Lola | B98/10 | | BMW | LMP |
| 99 | Nearn / Schumacher / *O'Steen | Schumacher Racing (USA) | Larry Schumacher | Porsche | 993 GT2 | | Porsche | GTS |