| 0 | Maxwell / Czapka / Wilkins / Lacey / Malowney | Multimatic Motorsports (CDN) | Peter Czapka | Porsche | 993 GT2 | R | Porsche | GTO |
| 01 | Wilden / Mowlem | Reiser Callas Rennsport | | Porsche | 996 GT3-R | | Porsche | GTU |
| 02 | | Reiser Callas Rennsport | | Porsche | 993 Carrera | RSR | Porsche | GTU |
| 04 | | General Kinetics | | Chevrolet | Camaro | | Chevrolet | AGT |
| 06 | Empringham / Sutherland | Multimatic Motorsports (CDN) | Scott Maxwell | Lola | B98/10 | | Ford | SR |
| 07 | | G&W Motorsports (USA) | | Porsche | 993 Carrera | RSR | Porsche | GTU |
| 09 | Conway / Flis / Flis / Goad / Riggins | The Spirit Of Daytona (USA) | | Chevrolet | Camaro | IV | Chevrolet | AGT |
| 2 | Lewis / Wagner / Mazzuoccola | MCR/Aspen Knolls (USA) | | Porsche | 996 GT3-R | | Porsche | GTU |
| 3 | Bell / Fellows / Kneifel | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTO |
| 4 | Collins / Pilgrim / Fréon | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTO |
| 5 | Angelelli / Taylor | Team Cadillac (USA) | | Cadillac | Northstar LMP | | Cadillac | SR |
| 6 | Andy Wallace | Team Cadillac (USA) | | Cadillac | Northstar LMP | | Cadillac | SR |
| 8 | Camferdam / Schubot | Philip Creighton Motorsport Ltd | | Riley & Scott | Mk III | | Ford | SR |
| 9 | Werner / Hayner / Schramm / Miller / Miller | RVO Motorsports | | Chevrolet | Camaro | | Chevrolet | AGT |
| 12 | Schiattarella / Kelleners / Caffi | Risi Competizione (USA) | | Ferrari | 333 SP | | Ferrari | SR |
| 13 | Jim Higgs | DM Motorsports | | Chevrolet | Camaro | | Chevrolet | AGT |
| 14 | John Heinricy | Specter Werkes Sports | | Chevrolet | Corvette C5 | | Chevrolet | GTO |
| 15 | Paul Kesselring | Kreider Motorsports (USA) | | Chevrolet | Corvette | | Chevrolet | GTO |
| 16 | Weaver / Papis | Dyson Racing Team (USA) | | Reynard | 2KQ | | Ford | SR |
| 17 | Groom / Spranger | Free Spirit Motorsports | | Porsche | 993 GT2 | | Porsche | GTO |
| 18 | Werner / Miller | RVO Motorsports | | Chevrolet | Camaro | | Chevrolet | AGT |
| 21 | Lambert / Pobst / Carradine / Conte | Alex Job Racing (USA) | | Porsche | 996 GT3-R | | Porsche | GTU |
| 22 | Scott Goodyear | SMS Seikel Motor Sport (D) | Peter Seikel | Porsche | 996 GT3-R | | Porsche | GTU |
| 23 | Conte / Lambert / Pobst / Carradine | Alex Job Racing (USA) | Alex Job | Porsche | 996 GT3-R | | Porsche | GTU |
| 25 | | Broadfoot/Press Racing | | Porsche | 944 | Turbo | Porsche | GTO |
| 26 | Rodenroth / Gregg / Jennings / Montgomery / Hampton | Broadfoot/Press Racing | | Porsche | 944 | Turbo | Porsche | GTO |
| 27 | Baldi / Lienhard / Theys / Bentley | Doran Enterprises Inc. (USA) | | Ferrari | 333 SP | | Ferrari | SR |
| 28 | | Yellow Magic | | Ferrari | F355 | | Ferrari | GTU |
| 29 | Field / Field | Intersport Racing (USA) | | Riley & Scott | Mk III | | Ford | SR |
| 31 | Konrad / Lammers / Field / Maassen | Konrad Motorsport (D) | Franz Konrad | Lola | B98/10 | | Ford | SR |
| 34 | | Spencer Pumpelly (USA) | | Porsche | 993 Carrera | RSR | Porsche | GTU |
| 36 | Matthews / Johansson / Smith | Johansson Matthews Racing (USA) | | Reynard | 2KQ | | Judd | SR |
| 42 | | EBRT/Schroeder Motorsport (B) | | Pilbeam | MP84 | | Nissan | SR2 |
| 46 | Erik Messley | Chamberlain Motorsport (GB) | Hugh Chamberlain | Dodge | Viper | GTS-R | Dodge | GTO |
| 47 | | RaceStar Motorsports (USA) | | Spice | SE90 | | Chevrolet | SR |
| 50 | | Genesis Racing | | BMW | M3 | E36 | BMW | GTU |
| 51 | Luhr / Müller | Dick Barbour Racing (USA) | | Porsche | 996 GT3-R | | Porsche | GTU |
| 53 | Thorne / Udwary | Diablo Racing (USA) | Ellen Barbara | Chevrolet | Camaro | IV | Chevrolet | AGT |
| 54 | | Bell Motorsports (USA) | James Bell | BMW | M3 | E36 | BMW | GTU |
| 55 | Bill Auberlen | Genesis Racing | | BMW | M3 | | BMW | GTU |
| 58 | Hajducky / Oneglia / Geremia / Rutherford / Fengler / Shalala / Cogbill | Pro Technik Racing (USA) | Sam Shalala | Porsche | 993 | | Porsche | GTU |
| 61 | | Paragon Motorsports | | Porsche | 964 Carrera | Cup | Porsche | GTU |
| 62 | Drendel / Neuman / Said | The Racers Group/Westward Ho Casino (USA) | Kevin Buckler | Porsche | 996 GT3 Cup | | Porsche | GTU |
| 63 | | Downing Atlanta Inc. (USA) | Jim Downing | Kudzu | DLY | | Mazda | SR |
| 65 | | The Racers Group/Wade's Guns (USA) | Kevin Buckler | Porsche | 993 Carrera | RSR | Porsche | GTU |
| 66 | | The Racers Group/Team Seattle Children's Hospital (USA) | Kevin Buckler | Porsche | 996 GT3-R | | Porsche | GTU |
| 67 | | The Racers Group/Westward Ho Casino (USA) | Kevin Buckler | Porsche | 996 GT3-R | | Porsche | GTU |
| 68 | Kiichi Takahashi | The Racers Group (USA) | Kevin Buckler | Porsche | 911 Carrera RSR | | Porsche | GTU |
| 70 | Cameron McConville | Skea Racing International (AUS) | | Porsche | 996 GT3-R | | Porsche | GTU |
| 71 | | Alegra | | Porsche | 911 Carrera RSR | | Porsche | GTU |
| 72 | Said / Drendel / Borcheller / Neuman / Johnson | Bell Motorsports (USA) | | BMW | M3 | E36 | BMW | GTU |
| 74 | Robinson / Haywood | Robinson (USA) | | Riley & Scott | Mk III | | Chevrolet | SR |
| 75 | Kelleners / Jeannette / Newman | Champion Racing Inc. (USA) | | Porsche | 996 GT3-R | | Porsche | GTU |
| 81 | Alzen / Huisman / Law / Huisman | G&W Motorsports (USA) | | Porsche | 996 GT3-R | | Porsche | GTU |
| 84 | Steven Lynn | Comer Racing Inc. | | Chevrolet | Camaro | IV | Chevrolet | AGT |
| 87 | Crowder / McCormick / Hindery / Kester / Baron | MCR/Nygmatech | | Porsche | 993 Carrera | RSR 3.8 | Porsche | GTU |
| 89 | Baron / Hindery / Kester | MCR/Nygmatech | | Porsche | 996 GT3-R | | Porsche | GTU |
| 91 | Donohue / Belloc / Beretta / Raphanel | Viper Team Oreca (F) | Hugues de Chaunac | Dodge | Viper | GTS-R | Dodge | GTO |
| 92 | Donohue / Belloc | Viper Team Oreca (F) | Hugues de Chaunac | Dodge | Viper | GTS-R | Dodge | GTO |
| 95 | Volk / Waddell | TRV Motorsport | | Riley & Scott | Mk III | | Chevrolet | SR |
| 96 | Arbisman / White / Lewis / Nagel | Nucap | | Porsche | 996 GT3 Cup | | Porsche | GTU |
| 98 | Duncan / James / Refenning | Grand Touring Technologies Inc. | | Porsche | 996 GT3 Cup | | Porsche | GTU |
| 99 | Schumacher / O'Steen / Snow | Schumacher Racing (USA) | Larry Schumacher | Porsche | 993 GT2 | | Porsche | GTO |