| 00 | David Empringham / Klaus Bytzek / Richard Spenard / James Holtom | Porsche 911 GT1 Evo | Bytzek Motorsports |
| 03 | Martin Shuster / Larry Baisden / John Annis / Toto Lassally | Marcos Mantis Plus | Marcos Racing International USA |
| 06 | Ian James / *Michael Jacobs / *John Paul, Jr. / *Travis Duder / *Michael DeFontes | Riley & Scott Mk III Ford | Jacobs Motorsports |
| 07 | Darren Law / Steve Marshall / Armando Trentini / *Cort Wagner | Picchio D-USA BMW | G&W Motorsports |
| 08 | Cor Euser / Calum Lockie / Duncan Huisman | Marcos Mantara LM600 | Marcos Racing International |
| 09 | Craig Conway / Doug Goad / Andy Pilgrim / Mike Ciasulli | Chevrolet Corvette | Flis Motorsports |
| 2 | Jan Lammers / Johnny Mowlem / Tony Stewart | Crawford SSC2K Judd | Crawford Racing |
| 3 | Paul Gentilozzi / Scott Pruett / Michael Lauer / Brian Simo | Jaguar XKR | Rocketsports Racing |
| 7 | Luca Riccitelli / Vincent Vosse / Dieter Quester / Boris Said | Porsche 996 GT3-R 3.8 | RWS Motorsport |
| 8 | Anthony Lazzaro / Bill Rand / Terry Borcheller / Ralf Kelleners | Lola B2K/40 Nissan | Rand Racing/Risi Competizione |
| 13 | Eric van de Poele / David Brabham / Stefan Johansson | Ferrari 333 SP | Risi Competizione |
| 16 | James Weaver / Butch Leitzinger / Oliver Gavin | Riley & Scott Mk III Ford | Dyson Racing Team |
| 18 | Dilantha Malagamuwa / Scott Deware / *Charles Lamb / *Martin Short | Mosler MT900R | Boston Motorsports Group |
| 19 | Kerry Hitt / Jim Briody / Owen Trinkler / Shane Lewis / *Jim Ludwik | Chevrolet Corvette | ACP Motorsports |
| 20 | Elliot Forbes-Robinson / Rob Dyson / Chris Dyson / Dorsey Schroeder | Riley & Scott Mk III Ford | Dyson Racing Team |
| 22 | Chad Block / Steven Knight / Brian DeVries / Mel Hawkins | Lola B2K/40 Nissan | Archangel Motorsport Services |
| 23 | Ben Collins / Klaas Zwart / Christian Vann | Ascari KZR-1 BMW | Team Ascari |
| 24 | João Barbosa / Michel Neugarten / Thierry Perrier | Mosler MT900R | Perspective Racing |
| 27 | Didier Theys / Fredy Lienhard / Max Papis / Mauro Baldi | Dallara LMP Judd | Doran Lista Racing |
| 29 | Irv Hoerr / Woodson Duncan / Jack Busch / Darin Brassfield | Ford Mustang | Sky Blue Racing |
| 30 | Joel Field / Larry Oberto / Mark Neuhaus / Clint Field | Lola B2K/10 Judd | Intersport Racing |
| 31 | Charles Slater / Toni Seiler / Martin Short / Gunnar Jeannette / *Vic Rice | Saleen S7-R | Konrad Motorsport |
| 33 | Cort Wagner / Bill Auberlen / Constantino Bertuzzi / Derrike Cope | Ferrari 360 Modena N-GT | Scuderia Ferrari of Washington |
| 34 | Spencer Pumpelly / *Steven Ivankovich / *Randy Pobst / *Kimberly Hiskey | Porsche 996 GT3-RS | ZIP Racing |
| 35 | Gerry Green / Richard Valentine / Jim Walsh / Rick Dilorio | Porsche 996 GT3-R | ZIP Racing |
| 36 | Guy Smith / Scott Sharp / Robby Gordon / Jim Matthews | Riley & Scott Mk III C Elan | Jim Matthews Racing |
| 37 | Jon Field / Duncan Dayton / Mike Durand / Rick Sutherland | Lola B2K/10B Judd | Intersport Racing |
| 38 | Andy Wallace / Sascha Maassen / Hurley Haywood / Lucas Luhr | Lola B2K/10 Porsche | Champion Racing |
| 40 | Brady Refenning / Catesby Jones / Jake Vargo / Carlos de Quesada | BMW M3 E46 | Alegra Motorsports/901 Shop |
| 43 | Peter Baron / Kyle Petty / Mike Borkowski / Leo Hindery | Porsche 996 GT3-RS | Orbit Racing |
| 45 | Mike Hezemans / Simon Gregg / Stefano Zonca / Marc Bunting | Dodge Viper GTS-R | American Viper Racing |
| 46 | Charles Morgan / Andrew Richards / Stephen Richards / Rob Morgan | Chevrolet Corvette | Morgan Dollar Motorsports |
| 49 | Werner Lupberger / Timothy Bell / Harri Toivonen | Ascari KZR-1 Judd | Team Ascari |
| 51 | Chris Bingham / Peter MacLeod / Wade Gaughran / Vic Rice | Saleen S7-R | Park Place Racing/Team Seattle |
| 60 | Anthony Puleo / Robert Dubler / *Ernst Gschwender / *Hans Hauser | Chevrolet Corvette | Xtreme Racing Group |
| 62 | Dennis Spencer / Barry Waddell / Ryan Hampton / Rich Grupp | Kudzu DLM/FW Mazda | Team Spencer Motorsports |
| 63 | Charles Nearburg / Chris Ronson / John Lloyd / Jim Downing | Kudzu DLY Mazda | Downing Atlanta |
| 72 | David Murry / Jack Lewis / Keith Fisher / Tom McGlynn | Porsche 996 GT3 Cup | Jack Lewis Enterprises |
| 73 | Mike Jordan / Mark Sumpter / Graeme Langford / David Warnock | Porsche 996 GT3-R | Team Eurotech |
| 74 | Jack Baldwin / George Robinson / Wally Dallenbach, Jr. / Mark Simo | Riley & Scott Mk III C Judd | Robinson Racing |
| 77 | Christophe Bouchut / Patrice Goueslard / Jean-Luc Chéreau / Carl Rosenblad | Dodge Viper GTS-R | Larbre Competition |
| 78 | Yannick Roussel / John Mirro / Jon Krolowicz / François O'Born / *Anthony Kumpen | Norma M2000-01 Ford | Sezio Florida Racing Team |
| 82 | Dick Greer / Jack Willes / Terry Lingner / John Finger | Chevrolet Corvette | Dick Greer Racing - Wendy's |
| 83 | Ian McKellar / Thomas Erdos / Ron Johnson / Bobby Verdon-Roe | Saleen S7-R | Graham Nash Motorsport |
| 85 | Robert Orcutt / Philippe Haezebrouck / Ross Bleustein / Rob Croydon | Porsche 996 GT3-RS | Freisinger Motorsport |
| 89 | Robert Julien / Lynn Wilson / Mayo T. Smith / *Adam Merzon | Lola B2K/40 Nissan | Porschehaus Racing |
| 90 | Kevin Harvick / Rick Carelli / John Metcalf / Dave Liniger | Chevrolet Corvette | Flis Motorsports |
| 95 | Jeret Schroeder / John Macaluso / John Schneider / Tom Volk | Riley & Scott Mk III Chevrolet | TRV Motorsport |
| 96 | Andrea Montermini / Vincenzo Polli / Franco Bertoli / Sergey Zlobin | Ferrari 360 GT | Mastercar SRL |
| 99 | Rob Wilson / Martyn Konig / Paul Dawson / Pete Hannen | Porsche 996 GT3-R | Cirtek Motorsport |
| 0 | James Holtom / Richard Spenard / David Empringham / Klaus Bytzek / *Harry Bytzek | Porsche 911 GT1 Evo | Bytzek Motorsports |
| 05 | Jeff Bucknum / Pierre Ehret / *Chris McMurry / *Tom Dyer | Pilbeam MP84 Nissan | Team Bucknum Racing |
| 55 | Bruce Dewey / Ron Grimm / David Rankin / *Gary Smith | Chevrolet Camaro | Dewey Motorsports |
| 71 | Chris Thompson / Jerry Thompson / Michael DeFontes / David Brown | Chevrolet Corvette | ACP Motorsports |