| | No | Class | T | Team | Driver | Car |
| 1 | 1 | LMP1 | M | Audi Sport North America | Christijan Albers
Emanuele Pirro
| Audi R10 TDI |
| 2 | 2 | LMP1 | M | Audi Sport North America | Lucas Luhr
Marco Werner | Audi R10 TDI |
| 3 | 10 | LMP1 | D | ECO Racing | Hideki Noda
Andrew Prendeville
| Radical SR10 AER |
| 4 | 12 | LMP1 | D | Autocon Motorsports | Chris McMurry
Tony Burgess
| Lola B06 10 AER |
| 5 | 37 | LMP1 | D | Intersport Racing | Jon Field
Ryan Lewis
Richard Berry | Lola B06/10 AER |
| 6 | 48 | LMP1 | D | Corsa Motorsports | Johnny Mowlem
Gunnar Jeannette
Stefan Johansson
| Zytek 07S Zytek |
| 7 | 88 | LMP1 | D | Creation Autosportif | Jamie Campbell-Walter
Stephen Simpson
Liz Halliday | Creation CA07 Aim |
| 8 | 5 | LMP2 | M | Penske Motorsports, Inc. | Helio Castroneves
Ryan Briscoe | Porsche RS Spyder |
| 9 | 6 | LMP2 | M | Penske Racing | Sascha Maassen
Patrick Long
| Porsche RS Spyder |
| 10 | 7 | LMP2 | M | Penske Racing | Timo Bernhard
Romain Dumas | Porsche RS Spyder |
| 11 | 8 | LMP2 | D | BK Motorsports | Ben Devlin
Gerardo Bonilla
Raphael Matos
| Lola B07/46 Mazda |
| 12 | 9 | LMP2 | M | Patron Highcroft Racing | David Brabham
Scott Sharp
| Acura ARX-01B |
| 13 | 15 | LMP2 | M | Lowe's Fernandez Racing | Adrian Fernandez
Luis Diaz
| Acura ARX -01B |
| 14 | 16 | LMP2 | M | Dyson Racing | Chris Dyson
Guy Smith | Porsche RS Spyder |
| 15 | 20 | LMP2 | M | Dyson Racing | Butch Leitzinger
Marino Franchitti
| Porsche RS Spyder |
| 16 | 26 | LMP2 | M | Andretti Green Racing | Franck Montagny
Tony Kanaan
| Acura ARX-01B |
| 17 | 66 | LMP2 | M | de Ferran Motorsports | Gil de Ferran
Simon Pagenaud
| Acura ARX-01B |
| 18 | 3 | GT1 | M | Corvette Racing | Johnny O'Connell
Jan Magnussen
| Chevrolet Corvette C6.R |
| 19 | 4 | GT1 | M | Corvette Racing | Olivier Beretta
Oliver Gavin
| Chevrolet Corvette C6.R |
| 20 | 11 | GT2 | H | Primetime Race Group | Joel Feinberg
Chris Hall | Dodge Viper Competition Coupe |
| 21 | 18 | GT2 | K | VICI Racing | Nicky Pastorelli
Marc Basseng
Francesco Pastorelli | Porsche 911 GT3 RSR |
| 22 | 21 | GT2 | Y | Panoz Team PTG | Tommy Milner
Joey Hand
| Panoz Esperante Ford |
| 23 | 40 | GT2 | D | Robertson Racing | David Robertson
Andrea Robertson
David Murry | Doran Ford GT-R |
| 24 | 44 | GT2 | M | Flying Lizard Motorsports 44 | Darren Law
Seth Neiman
Lonnie Pechnik | Porsche 911 GT3 RSR |
| 25 | 45 | GT2 | M | Flying Lizard Motorsports | Jörg Bergmeister
Wolf Henzler
| Porsche 911 GT3 RSR |
| 26 | 46 | GT2 | M | Flying Lizard Motorsports | Johannes van Overbeek
Patrick Pilet | Porsche 911 GT3 RSR |
| 27 | 54 | GT2 | F | Black Swan Racing | Tim Pappas
Anthony Lazzaro
Andy Pilgrim | Doran Ford GT-R |
| 28 | 61 | GT2 | M | Risi Competizione | Tracy Krohn
Nic Jonsson
| Ferrari 430 GT |
| 29 | 62 | GT2 | M | Risi Competizione | Jaime Melo
Mika Salo | Ferrari 430 GT |
| 30 | 71 | GT2 | M | Tafel Racing | Dominik Farnbacher
Dirk Müller | Ferrari 430 GT |
| 31 | 73 | GT2 | M | Tafel Racing | Alex Figge
Harrison Brix
Pierre Ehret | Ferrari 430 GT |
| 32 | 87 | GT2 | M | Farnbacher Loles Racing | Dirk Werner
Bryce Miller
| Porsche 911 GT3 RSR |
| 33 | 99 | GT2 | M | JMB Racing | Ben Aucott
Pierre Kaffer
| Ferrari 430 GT |
| 34 | 007 | GT2 | D | Drayson-Barwell | Paul Drayson
Jonny Cocker
| Aston Martin Vantage |
