| 3 | Fellows / O'Connell / Papis | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 4 | Gavin / Beretta / Magnussen | Corvette Racing (USA) | Doug Fehan | Chevrolet | Corvette C5 | -R | Chevrolet | GTS |
| 7 | Fitzgerald / Gue / Rand | Rand Racing (USA) | Bill Rand | Lola | B2K/40 | | Nissan | LMP2 |
| 8 | Franchitti / *Hill / *Lally | Rand Racing (USA) | Bill Rand | Lola | B2K/40 | | Nissan | LMP2 |
| 10 | James / Macaluso / Borkowski | American Spirit Racing, Inc. (USA) | John Macaluso | Lola | B2K/40 | | Nissan | LMP2 |
| 11 | Workman / Bradley / Sak | American Spirit Racing, Inc. (USA) | Jon Lewis | Lola | B2K/40 | | Nissan | LMP2 |
| 12 | Drissi / Lewis / Rice | Autocon Motorsports (USA) | Michael Lewis | Riley & Scott | Mk III C | | Lincoln | LMP1 |
| 15 | Wilson / Andrews / Duno | Taurus Racing (GB) | Ian Dawson | Lola | B2K/10 | B | Judd | LMP1 |
| 16 | Weaver / Wallace / Leitzinger | Dyson Racing Team, Inc. (USA) | Rob Dyson | Lola | EX257 | | AER | LMP1 |
| 19 | van der Steur / *van der Steur / *Pumpelly | Van der Steur Racing, Inc. (USA) | Gunnar Van der Steur | Lola | B2K/40 | | Nissan | LMP2 |
| 20 | Dyson / Lammers / de Radigues | Dyson Racing Team, Inc. (USA) | Rob Dyson | Lola | EX257 | | AER | LMP1 |
| 22 | Barbosa / Barff / Short | Rollcentre Racing (GB) | Martin Short | Dallara | SP1 | | Judd | LMP1 |
| 23 | Bernhard / Maassen / *Bergmeister | Alex Job Racing (USA) | Alex Job | Porsche | 996 GT3-RSR | | Porsche | GT |
| 24 | Dumas / Lieb / Luhr | Alex Job Racing (USA) | Alex Job | Porsche | 996 GT3-RSR | | Porsche | GT |
| 25 | Sullivan / Bosch / Biagi | Barron Connor Racing (NL) | John Bosch | Ferrari | 575 Maranello | GTC | Ferrari | GTS |
| 26 | Hezemans / Delétraz / Barde | Barron Connor Racing (NL) | John Bosch | Ferrari | 575 Maranello | GTC | Ferrari | GTS |
| 28 | Kaffer / McNish / Biela | Audi Sport UK Team Veloqx (GB) | Sam Li | Audi | R8 | | Audi | LMP1 |
| 30 | Field / Binnie / Sutherland | Intersport Racing (USA) | Jon Field | Lola | B2K/40 | | Judd | LMP2 |
| 31 | Murry / Stanton / *Petersen | White Lightning Racing (USA) | Michael Petersen | Porsche | 996 GT3-RS | | Porsche | GT |
| 31T | Murry / Petersen | White Lightning Racing (USA) | Michael Petersen | Porsche | 996 GT3-RSR | | Porsche | GT |
| 32 | Wilson / Mountain / Brooks | Cirtek Motorsport (USA) | Robert Schirle | Porsche | 996 GT3-RSR | | Porsche | GT |
| 32T | Frank Mountain | Cirtek Motorsport (GB) | Robert Schirle | Porsche | 996 GT3-RS | | Porsche | GT |
| 33 | Durand / Block / Forgeois | Intersport Racing (USA) | Jon Field | Riley & Scott | Mk III C | | Ford | LMP1 |
| 35 | Kelleners / Lazzaro / Bobbi | Risi Competizione (USA) | Giuseppe Risi | Ferrari | 360 Modena | GTC | Ferrari | GT |
| 37 | Field / Dayton / Connor | Intersport Racing (USA) | Jon Field | Lola | B01/60 | | Judd | LMP1 |
| 38 | Pirro / Lehto / Werner | Champion Racing (USA) | Dave Maraj | Audi | R8 | | Audi | LMP1 |
| 43 | Rockenfeller / Baron / Hindery | BAM! British American Motorsport (USA) | Peter Baron/tim Munday | Porsche | 996 GT3-RS | | Porsche | GT |
| 43T | Baron / Hindery / Rockenfeller | BAM! British American Motorsport (USA) | Peter Baron/tim Munday | Porsche | 996 GT3-RSR | | Porsche | GT |
| 44 | Pechnik / Neiman / Cunningham | Flying Lizard Motorsports (USA) | Seth Neiman | Porsche | 996 GT3-RS | | Porsche | GT |
| 44T | Fogarty / Law / Van Overbeek | Flying Lizard Motorsports (USA) | Johannes van Overbeek | Porsche | 996 GT3-RSR | | Porsche | GT |
| 45 | Fogarty / Law / Van Overbeek | Flying Lizard Motorsports (USA) | Johannes van Overbeek | Porsche | 996 GT3-RSR | | Porsche | GT |
| 49 | Cunningham / Ahlers / Sharpe | Morgan Works Race Team (GB) | Charles Morgan | Morgan | Aero 8 | GTN | BMW | GT |
| 50 | Cochran / *Faulkner / *Zabinski | Team Elite (GB) | Keith Smout | Lotus | Elise GT1 | | Chevrolet | LMP1 |
| 52 | Burgess / Collin / Willingham | Seikel Motorsport (D) | Peter Seikel | Porsche | 996 GT3-RS | | Porsche | GT |
| 56 | Bucknum / McMurry / Willman | Team Bucknum Racing (USA) | Jeff Bucknum | Pilbeam | MP91 | | Nissan | LMP2 |
| 60 | Liddell / Plumb / Boss | P.K. Sport (GB) | Mike Pickup | Porsche | 996 GT3-R | | Porsche | GT |
| 61 | Caffi / Warnock / Krohn | P.K. Sport (GB) | Mike Pickup | Porsche | 996 GT3-R | | Porsche | GT |
| 63 | Brabham / Mowlem / Borcheller | ACEMCO Motorsports (USA) | Jeff Giangrande | Saleen | S7-R | | Ford | GTS |
| 63T | Brabham / Mowlem / Borcheller | ACEMCO Motorsports (USA) | Jeff Giangrande | Saleen | S7-R | | Ford | GTS |
| 66 | Wagner / Long / Collins | New Century Mortgage/Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RSR | | Porsche | GT |
| 67 | Bunting / Ehret / Matthews | New Century Mortgage/Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RSR | | Porsche | GT |
| 68 | Fisken / Donaldson / Masarati / *Buckler | New Century Mortgage / Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RS | | Porsche | GT |
| 71 | Belloc / Weickardt / Allen | Carsport America (USA) | Tom Weickardt | Dodge | Viper | GTS-R | Dodge | GTS |
| 78 | Kapudija / Jönsson / Porter, Jr. / *Jackson | J-3 Racing (USA) | Jaye M. Jackson | Porsche | 996 GT3-RS | | Porsche | GT |
| 79 | Jackson / Cunningham / Sugden | J-3 Racing (USA) | Jaye M. Jackson | Porsche | 996 GT3-RSR | | Porsche | GT |
| 86 | Bouchut / Blanchemain / Bervillé | Larbre Competition (F) | Jack Leconte/Jean-Luc Chereau | Panoz | GTP | | Elan | LMP1 |
| 88 | Herbert / Smith / Davies | Audi Sport UK Team Veloqx (GB) | Sam Li | Audi | R8 | | Audi | LMP1 |
| 88T | | Care Racing (F) | Frederic Dor | Ferrari | 550 Maranello | | Ferrari | GTS |
| 91 | Stockton / Evans / Stretton | Chamberlain - Synergy Motorsport (GB) | Hugh Chamberlain | TVR | Tuscan | T400R | TVR | GT |
| 92 | Berridge / Caroline / Caine | Chamberlain - Synergy Motorsport (GB) | Hugh Chamberlain | TVR | Tuscan | T400R | TVR | GT |