| | No. | Class | T | Team | Drivers | Car |
| 1 | 8 | P1 | M | Drayson Racing | Paul Drayson
Jonny Cocker
Emanuele Pirro | Lola B09/60 Judd |
| 2 | 10 | P1 | tbc | Creation Autosportif
Withdrawn | TBA
TBA | Creation CA10 Judd |
| 3 | 12 | P1 | D | Autocon Motorsports | Bryan Willman
Tony Burgess
Pierre Ehret | Lola B06/10 AER |
| 4 | 37 | P1 | D | Intersport Racing
Withdrawn | Jon Field
Clint Field | Lola B06/10 AER |
| 5 | 07 | P1 | M | Team Peugeot Total | Marc Gené
Alexander Wurz
Anthony Davidson | Peugeot 908 HDi FAP |
| 6 | 08 | P1 | M | Team Peugeot Total | Pedro Lamy
Sébastien Bourdais
Nicolas Minassian | Peugeot 908 HDi FAP |
| 7 | 009 | P1 | M | Aston Martin Racing | Stefan Mucke
Harold Primat
Adrian Fernandez | Lola B09/60 Aston Martin |
| 8 | 1 | P2 | M | Patrón Highcroft Racing | David Brabham
Simon Pagenaud
Marino Franchitti | HPD ARX-01c HPD |
| 9 | 6 | P2 | M | Muscle Milk Team Cytosport | Greg Pickett
Klaus Graf
Sascha Maassen | Porsche RS Spyder |
| 10 | 16 | P2 | D | Dyson Racing Team | Chris Dyson
Guy Smith
Andy Meyrick | Lola B09/86 Mazda |
| 11 | 3 | GT2 | M | Corvette Racing | Jan Magnussen
Johnny O'Connell
Antonio Garcia | Chevrolet Corvette ZR1 |
| 12 | 4 | GT2 | M | Corvette Racing | Olivier Beretta
Oliver Gavin
Emmanuel Collard | Chevrolet Corvette ZR1 |
| 13 | 17 | GT2 | F | Team Falken Tire | Bryan Sellers
Wolf Henzler
Patrick Pilet | Porsche 911 GT3 RSR |
| 14 | 40 | GT2 | D | Robertson Racing | David Robertson
Andrea Robertson
David Murry | Doran Design Ford GT MK 7 |
| 15 | 44 | GT2 | M | Flying Lizard Motorsports | Darren Law
Seth Neiman
Richard Lietz | Porsche 911 GT3 RSR |
| 16 | 45 | GT2 | M | Flying Lizard Motorsports | Jörg Bergmeister
Patrick Long
Marc Lieb | Porsche 911 GT3 RSR |
| 17 | 61 | GT2 | M | Risi Competizione | Tracy Krohn
Nic Jonsson
Eric van de Poele | Ferrari 430 GT |
| 18 | 62 | GT2 | M | Risi Competizione | Jaime Melo
Gianmaria Bruni
Pierre Kaffer | Ferrari 430 GT |
| 19 | 75 | GT2 | Y | Jaguar RSR | Paul Gentilozzi
Marc Goossens
Ryan Dalziel | Jaguar XKRS |
| 20 | 90 | GT2 | D | BMW Rahal Letterman
Racing Team | Dirk Müller
Joey Hand
Andy Priaulx | BMW E92 M3 |
| 21 | 92 | GT2 | D | BMW Rahal Letterman
Racing Team | Bill Auberlen
Tommy Milner
Dirk Werner | BMW E92 M3 |
| 22 | 01 | GT2 | M | Extreme Speed Motorsports | Scott Sharp
Johannes van Overbeek
Dominik Farnbacher | Ferrari 430 GT |
| 23 | 02 | GT2 | M | Extreme Speed Motorsports | Ed Brown
Guy Cosmo
Joao Barbosa | Ferrari 430 GT |
| 24 | 11 | LMPC | M | Primetime Race Group | Joel Feinberg
Kyle Marcelli | Oreca FLM09 |
| 25 | 36 | LMPC | M | Genoa Racing | Andy Wallace
JR Hildebrand
Tom Sutherland | Oreca FLM09 |
| 26 | 55 | LMPC | M | Level 5 Motorsports | Scott Tucker
Christophe Bouchut
Mark Wilkins | Oreca FLM09 |
| 27 | 89 | LMPC | M | Intersport Racing | Mitch Pagerey
Brian Wong
David Ducote | Oreca FLM09 |
| 28 | 95 | LMPC | M | Level 5 Motorsports | Scott Tucker
Ryan Hunter-Reay
James Gue | Oreca FLM09 |
| 29 | 99 | LMPC | M | Green Earth Team Gunnar | Christian Zugel
Gunnar Jeannette
Elton Julian | Oreca FLM09 |
| 30 | 23 | GTC | Y | Alex Job Racing | Bill Sweedler
Romeo Kapudija
Jan-Dirk Lueders | Porsche 911 GT3 Cup |
| 31 | 32 | GTC | Y | GMG Racing | Bret Curtis
James Sofronas
Andy Pilgrim | Porsche 911 GT3 Cup |
| 32 | 63 | GTC | Y | TRG | Henri Richard
Duncan Ende
Andy Lally | Porsche 911 GT3 Cup |
| 33 | 69 | GTC | Y | WERKS II Racing | Robert Rodriguez
Galen Bieker
Cory Friedman | Porsche 911 GT3 Cup |
| 34 | 80 | GTC | Y | Alex Job Racing | Ricardo Gonzalez
Luis Diaz
Patrick Kelly | Porsche 911 GT3 Cup |
| 35 | 81 | GTC | Y | Alex Job Racing | Juan Gonzalez
Butch Leitzinger
Leh Keen | Porsche 911 GT3 Cup |
| 36 | 88 | GTC | Y | Velox Motorsport | Shane Lewis
Jerry Vento
Lawson Aschenbach | Porsche 911 GT3 Cup |
