| 0 | Bytzek / Maxwell / Empringham / Brenner / Bytzek / Holtom | Bytzek Motorsports (CDN) | | Porsche | 911 GT1 | Evo | Porsche | GTS |
| 01 | Holtom / Maxwell / Empringham / Spenard / Bartling / Bytzek | Bytzek Motorsport (CDN) | | Porsche | 911 GT1 | Evo | Porsche | GTS |
| 02 | | Morrison/Mosler Racing (USA) | | Mosler | MT900 | R | Chevrolet | GT |
| 07 | Marshall / Marshall / Holt | G&W Motorsports (USA) | | Porsche | 993 GT2 | | Porsche | GTS |
| 09 | Conway / Goad / Flis | Flis Motorsports (USA) | | Chevrolet | Camaro | IV | Chevrolet | AGT |
| 2 | Fellows / Kneifel / Fréon | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 3 | Earnhardt / Pilgrim / Earnhardt, Jr. / Collins | Corvette Racing (USA) | | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 5 | Gentilozzi / Miller | Rocketsports (USA) | Paul Gentilozzi | Saleen | S7-R | | Ford | GTS |
| 6 | Downs / Tiller / Duder / Bucknum | TRP Racing | Michael Atkins | Lola | B2K/40 | | Nissan | SRPII |
| 8 | Schubot / Dayton / Burton | Philip Creighton Motorsports | | Lola | B2K/10 | | Ford | SRP |
| 9 | Miller / Schearer / Assentato / Veilleux / Bayer | Genesis Racing (USA) | | BMW | M3 | E36 | BMW | GT |
| 10 | Fairbanks / Auberlen / Gleason | Genesis Racing (USA) | Rick Fairbanks | BMW | M3 | E46 GT | BMW | GT |
| 11 | Bupp / Mills / Greer / Peters | Hamilton Safe Motorsports (USA) | | Chevrolet | Camaro | | Chevrolet | AGT |
| 13 | Kicak / Burkland / Kosovych | Free Spirit Motorsports | | Porsche | 993 GT2 | | Porsche | GTS |
| 14 | Friedman / Wilson / Hupfer / Alexander | Autometrics Motorsports | | Porsche | 993 Carrera | RSR 3.8 | Porsche | GT |
| 16 | Weaver / Wallace / Leitzinger / Oberto / Goddard / Mears / Jönsson | Dyson Racing Team (USA) | | Riley & Scott | Mk III | Series 2 | Ford | SRP |
| 20 | Dyson / Forbes-Robinson / Weaver | Dyson Racing Team (USA) | | Riley & Scott | Mk III | | Ford | SRP |
| 22 | Hampton / Dudek / Clinton / Seldon / Culver / Lally / Macey / Mullen / Plumb | Archangel Motorsport Services (USA) | Michael Johnson | Lola | B2K/40 | | Nissan | SRPII |
| 24 | Euser / Lockie / Buurman | Marcos Racing International (NL) | Cor Euser | Marcos | Mantara | LM600 Evo | Chevrolet | GTS |
| 25 | van der Kolk / Euser / Lassally / Lockie / Buurman | Marcos Racing International (NL) | | Marcos | Mantara | LM600 Evo | Chevrolet | GTS |
| 26 | Giangrande / Whitehead / Hall / Zacharias | Northstar Racing LLC | | Lola | B2K/40 | | Nissan | SRPII |
| 27 | Theys / Lienhard / Bentley / Baldi | Lista Doran Racing (USA) | | Crawford | SSC2K | | Judd | SRP |
| 28 | Field / Field / Brickell | Intersport Racing (USA) | | Riley & Scott | Mk III | | Ford | SRP |
| 31 | Fitzgerald / Menzel / Pobst / Luhr | White Lightning Racing | | Porsche | 996 GT3-RS | | Porsche | GT |
| 32 | Rick Fairbanks | Genesis Racing (USA) | Rick Fairbanks | Hawk | MD3R | | Chevrolet | SRP |
| 34 | Pumpelly / Ivankovich / Dilorio / Pumpelly | Spencer Pumpelly Racing | | Porsche | 996 GT3-R | | Porsche | GT |
| 37 | Jon Field | Intersport Racing (USA) | | Lola | B2K/10 | | Judd | SRP |
| 38 | Schroeder / Wollek / Haywood / Maassen | Champion Racing (USA) | | Lola | B2K/10 | | Porsche | SRP |
| 43 | Hindery / Baron / Kester / Petty | Orbit (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 44 | Amick / Varde / Amick | Team Amick Motorsports | | Chevrolet | Corvette | | Chevrolet | AGT |
| 45 | Jacobs / Maugeri / Zitza / Lacey | Jacobs Motorsports (USA) | Michael Jacobs | Lola | B98/10 | | Ford | SRP |
| 46 | Hitt / Thompson / Thompson / Crist / DeFontes | ACP Motorsports (USA) | | Chevrolet | Corvette | | Chevrolet | AGT |
| 48 | Cindi Lux | Pilbeam Racing America (USA) | | Pilbeam | MP84 | | Nissan | SRPII |
| 49 | Lux / Argetsinger | Pilbeam Racing America (USA) | | Pilbeam | MP84 | | Nissan | SRPII |
| 50 | Hajducky / Stanton / Oneglia / Suzuki | Aasco - Boduck | | Porsche | 996 GT3-R | | Porsche | GTS |
| 52 | Safina / Gabel / Longhi | Safina Racing (USA) | Joseph Safina | BMW | M3 | E36 | BMW | GT |
| 53 | Scheuren / Smith | Diablo Racing (USA) | Ellen Barbara | Chevrolet | Camaro | IV | Chevrolet | AGT |
| 56 | Rosa / Rosa / Babini | Seikel Motorsport (D) | Peter Seikel | Porsche | 996 GT3-RS | | Porsche | GT |
| 57 | Collin / Babini | Seikel Motorsport (D) | Peter Seikel | Porsche | 996 GT3-RS | | Porsche | GT |
| 58 | Tambourine / Drummond / Mandeville / Hall / Forrer | Team Tambourine | | Mazda | MX-5 | Miata | Mazda | GT |
| 62 | Spencer / Grupp | Team Spencer Motorsports | | Kudzu | DLM | | Mazda | SRPII |
| 63 | Downing / Smith / Katz / Ronson | Downing Atlanta Inc. (USA) | Jim Downing | Kudzu | DLY | | Mazda | SRP |
| 65 | Howard Goodman | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RS | | Porsche | GT |
| 66 | Gaughran / Marks / Miller / Takahashi / Walsh / Oberholtzer / Kitch / Parker / Gaylord | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-R | | Porsche | GT |
| 67 | Kitch / Gaylord / Oberholtzer / Parker / Takahashi / Gaughran / Miller / Walsh / Marks | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-R | | Porsche | GT |
| 68 | Buckler / Michaelian / Hiskey / Malagamuwa | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RS | | Porsche | GT |
| 73 | Ziegelman / Argetsinger / Lima | ProTeknik South (USA) | Alan Ziegelman | Porsche | 993 Carrera | RSR | Porsche | GT |
| 74 | Baldwin / Robinson / Hoerr / Lazier | Robinson Racing (USA) | | Riley & Scott | Mk III | | Judd | SRP |
| 75 | Policastro, Jr. / Policastro / Desimone / Kelleners | Gunnar Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 75T | Joe Policastro, Jr. | Broadfoot Racing (USA) | | Porsche | 996 GT3-R | | Porsche | GT |
| 76 | Newman / Jeannette / Jackson / Brockman / Kelleners | Gunnar Racing (USA) | | Porsche | 911 GT1 | Evo | Porsche | GTS |
| 78 | Sezionale / Roussel / Macaluso | Sezio Florida Racing Team | | Norma | M2000 | -01 | Mader | SRP |
| 79 | Dickens / Plumb | Sportscar Racing Team Sweden (S) | | Lola | B2K/40 | | Nissan | SRPII |
| 80 | Morton / Schrom | G&W Motorsports (USA) | | Porsche | 996 GT3-R | | Porsche | GT |
| 81 | Law / Drendel / Wagner / Huisman | G&W Motorsports (USA) | | Porsche | 996 GT3-R | | Porsche | GT |
| 83 | Lauer / DeVries / Simon / Simo | Bob Akin Motorsports (USA) | | Riley & Scott | Mk III | | Ford | SRP |
| 88 | Overing / Tancrede / Veilleux | Porsche Haus Racing (CDN) | | Lola | B2K/40 | | Nissan | SRPII |
| 89 | Julien / Putman / St. Jacques / Woodman | Porsche Haus Racing (CDN) | | Lola | B2K/40 | | Nissan | SRPII |
| 93 | Jan Rask | ProTechnik Racing | | Porsche | 996 GT3-R | | Porsche | GT |
| 94 | James King | Brutal Performance Racing | | Oldsmobile | Cutlass | | Chevrolet | AGT |
| 95 | Volk / Schroeder / Mirro / Waddell | TRV Motorsports | | Riley & Scott | Mk III | | Chevrolet | SRP |
| 97 | Millman / Byrne / Kester / Collucci | Orbit | | Porsche | 911 Carrera RSR | | Porsche | GT |
| 99 | Larry Schumacher | Schumacher Racing | | Porsche | 911 GT1 | | Porsche | GTS |
| 99 | Schumacher / O'Steen / Hayner | Schumacher Racing (USA) | Larry Schumacher | Porsche | 993 GT2 | | Porsche | GTS |