| | No. | Class | T | Team | Drivers | Car |
| 1 | 1 | LMP1 | M | Audi Sport North America | Lucas Luhr
Marco Werner | Audi R15 TDI |
| 2 | 2 | LMP1 | M | Audi Sport North America | Rinaldo Capello
Allan McNish | Audi R15 TDI |
| 3 | 7 | LMP1 | M | Oreca Matmut AIM | Olivier Panis
Nicolas Lapierre
Romain Dumas | Oreca 01 |
| 4 | 9 | LMP1 | M | Patron Highcroft Racing | David Brabham
Scott Sharp
Dario Franchitti | Acura ARX-02a |
| 5 | 10 | LMP1 | | ECO Racing | Hideki Noda
Jose Manuel Balbiani
Dion von Moltke | Radical SR9 |
| 6 | 12 | LMP1 | D | Autocon Motorsports | Tony Burgess
Bryan Willman
Chris McMurry | Lola B06/10 AER |
| 7 | 37 | LMP1 | D | Intersport Racing | Jon Field
Clint Field | Lola B06/10 AER |
| 8 | 66 | LMP1 | M | de Ferran Motorsports | Gil de Ferran
Simon Pagenaud
Scott Dixon | Acura ARX-02a |
| 9 | 88 | LMP1 | | Drayson Racing | Paul Drayson
Jonny Cocker
Rob Bell | Lola B09 60/Judd |
| 10 | 07 | LMP1 | M | Team Peugeot Total | Nicolas Minassian
Pedro Lamy | Peugeot 908 HDI FAP |
| 11 | 08 | LMP1 | M | Team Peugeot Total | Franck Montagny
Stephane Sarrazin | Peugeot 908 HDI FAP |
| 12 | 6 | LMP2 | M | Team Cytosport | Greg Pickett
Klaus Graf
Sasha Maassen | Porsche RS Spyder |
| 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 | Lola B09 86 Mazda |
| 15 | 19 | LMP2 | K | van der Steur Racing | Gunnar van der Steur
Adam Pecorari
Robbie Pecorari | Radical SR9 AER |
| 16 | 20 | LMP2 | M | Dyson Racing | Butch Leitzinger
Marino Franchitti
Den Devlin | Lola B08 86 Mazda |
| 17 | 3 | GT2 | M | Corvette Racing | Jan Magnussen
Johnny O'Connell
Antonio Garcia | Chevrolet Corvette C6.R |
| 18 | 4 | GT2 | M | Corvette Racing | Olivier Beretta
Oliver Gavin
Marcel Fassler | Chevrolet Corvette C6.R |
| 19 | 11 | GT2 | | Primetime Race Group | Joel Feinberg
Chris Hall | Dodge Viper Competition Coupe |
| 20 | 17 | GT2 | F | Team Falken Tire | Bryan Sellers
Dominic Cicero | Porsche 911 GT3 RSR |
| 21 | 21 | GT2 | Y | Panoz Team PTG | Dominik Farnbacher
Ian James | Panoz Esperante GTLM |
| 22 | 28 | GT2 | | LG Motorsports | Tom Sutherland
Tomy Drissi
Matt Bell | Chevrolet Riley CorvetteC6 |
| 23 | 40 | GT2 | D | Robertson Racing | David Robertson
Andrea Robertson
David Murry | Doran Ford GT MK 7 |
| 24 | 44 | GT2 | M | Flying Lizard Motorsports | Darren Law
Seth Neiman
Johannes Van Overbeek | Porsche 911 GT3 RSR |
| 25 | 45 | GT2 | M | Flying Lizard Motorsports | Jörg Bergmeister
Patrick Long
Marc Lieb | Porsche 911 GT3 RSR |
| 26 | 62 | GT2 | M | Risi Competizione | Jaime Melo
Pierre Kaffer
Miko Salo | Ferrari 430 GT |
| 27 | 87 | GT2 | M | Farnbacher Loles Racing | Wolf Henzler
Martin Ragginger | Porsche 911 GT3 RSR |
| 28 | 90 | GT2 | D | BMW Rahal Letterman
Racing Team | Joey Hand
Bill Auberlen
Andy Priaulx | BMW E92 M3 |
| 29 | 92 | GT2 | D | BMW Rahal Letterman
Racing Team | Dirk Müller
Tommy Milner
Jorg Muller | BMW E92 M3 |
