| 00 | Gunnar Jeannette / Chad Block / Wayne Jackson | Panoz LMP-1 Roadster S | Gunnar Racing |
| 5 | Chris Bingham / Vic Rice / Peter MacLeod | Saleen S7-R | Park Place Racing |
| 12 | Peter Kox / Derek Hill / Hans Hugenholtz | Spyker C8 Double 12R | Spyker Squadron |
| 17 | Milka Duno / Scott Maxwell / John Graham | Panoz LMP07 Mugen | MBD Sportscar |
| 18 | John Graham / Didier de Radigues / Bruno Lambert / Rick Sutherland | Panoz LMP07 Mugen | MBD Sportscar |
| 19 | Werner Lupberger / Timothy Bell / Kristian Kolby | Ascari KZR-1 Judd | Team Ascari |
| 20 | Chris Dyson / Elliot Forbes-Robinson / Dorsey Schroeder / Rob Dyson | Riley & Scott Mk III A Lincoln | Dyson Racing Team Inc |
| 21 | Ben Collins / Christian Vann / Justin Wilson | Ascari KZR-1 Judd | Team Ascari |
| 24 | Yojiro Terada / Jim Downing / John Fergus | AutoExe LMP-02 Mazda | AutoExe Motorsports |
| 25 | Charles Slater / Walter Brun / Gavin Pickering | Saleen S7-R | Konrad Motorsport |
| 27 | Didier Theys / Fredy Lienhard / Mauro Baldi | Dallara LMP Judd | Doran Lista Racing |
| 28 | Jean-René de Fournoux / Stéphane Daoudi / A. J. Smith | WR LM 2001 Peugeot | Welter Racing |
| 29 | Stephen Earle / Bart Hayden / Mark Griffiths | Porsche 996 GT3-R | Sebah Automotive Limited |
| 31 | Andrea Montermini / Peter Argetsinger / Ryan Hunter-Reay | Ferrari 360 Modena N-GT | JMB Racing |
| 32 | Oswaldo Negri / Andrea Garbagnati / Joe Vannini | Ferrari 360 Modena N-GT | JMB Racing |
| 33 | Ralf Kelleners / Marino Franchitti | Ferrari 360 Modena GT | MSB Motorsport |
| 36 | Marc Goossens / Guy Smith / Jim Matthews | Riley & Scott Mk III C Elan | Riley & Scott Racing |
| 40 | Jeff Jones / Ryan Jones / Jeffrey Jones | Reynard 2KQ VW | Racing Organisation Course |
| 41 | Jean-Denis Delétraz / Mark Smithson / Christophe Pillon | Reynard 2KQ VW | Noel Del Bello Racing |
| 46 | Mike Hezemans / Anthony Kumpen / Luca Cappellari | Chrysler Viper GTS-R | Team Carsport Holland |
| 52 | Hugh Plumb / Andrew Bagnall / Philip Collin | Porsche 996 GT3-RS | Seikel Motorsport |
| 53 | Alex Caffi / Luca Riccitelli / Gabrio Rosa | Porsche 996 GT3-RS | Seikel Motorsport |
| 57 | Romain Dumas / Ni Amorim / Hans Fertl | Porsche 996 GT3-RS | Freisinger Motorsport |
| 58 | Chip Vance / Stephen Southard | Porsche 996 GT3-RS | Freisinger Motorsport |
| 60 | Fabio Babini / Giovanni Anapoli / Robin Liddell | Porsche 996 GT3-RS | P.K. Sport Ltd. |
| 61 | Keith Alexander / Basil Demeroutis / Piers Masarati | Porsche 996 GT3-R | P.K. Sport Ltd. |
| 62 | Dennis Spencer / Rich Grupp | Lola B2K/42 Mazda | Team Spencer Motorsports |
| 65 | Terry Rymer / Mike Youles / Johnny Mowlem | Porsche 996 GT3-R | Harlow Motorsport - Ricardo |
| 69 | Kye Wankum / Joe Foster / Doc Bundy | Lola B2K/40 Nissan | Kyser Racing |
| 77 | Alain Menu / Rickard Rydell / Tomáš Enge | Ferrari 550 Maranello | Prodrive |
| 83 | Thomas Erdos / Ian McKellar / Ron Johnson | Saleen S7-R | Graham Nash Motorsport |
| 85 | Hervé Clément / André Ahrlé / Bernard Simmenauer | Porsche 996 GT3-RS | 917 Racing Team |
| 86 | Christophe Bouchut / Vincent Vosse / Jean-Luc Chéreau | Chrysler Viper GTS-R | Larbre Competition Chereau |
| 99 | Chris Gleason / Paul Dawson / David Gooding | Porsche 996 GT3-R | Cirtek Motorsport |