| | No. | Class | T | Team | Drivers | Car |
| 1 | 1 | LMP | M | Patrón Highcroft Racing | David Brabham
Simon Pagenaud | HPD ARX-01c HPD |
| 2 | 6 | LMP | M | Muscle Milk Team CytoSport | Klaus Graf
Romain Dumas | Porsche RS Spyder |
| 3 | 8 | LMP | M | Drayson Racing | Paul Drayson
Jonny Cocker | Lola B09/60 Judd |
| 4 | 12 | LMP | D | Autocon Motorsports | Tony Burgess
Johnny Mowlem | Lola B06/10 AER |
| 5 | 16 | LMP | D | Dyson Racing Team | Chris Dyson
Guy Smith | Lola B09/86 Mazda |
| 6 | 37 | LMP | D | Intersport Racing | Jon Field
Clint Field | Lola B06/10 AER |
| 7 | 3 | GT | M | Corvette Racing | Jan Magnussen
Johnny O'Connell | Chevrolet Corvette
ZR1 |
| 8 | 4 | GT | M | Corvette Racing | Olivier Beretta
Oliver Gavin | Chevrolet Corvette
ZR1 |
| 9 | 17 | GT | F | Team Falken Tire | Bryan Sellers
Wolf Henzler | Porsche 911
GT3 RSR |
| 10 | 40 | GT | D | Robertson Racing | David Robertson
Andrea Robertson
David Murry | Doran Design Ford
GT MK 7 |
| 11 | 44 | GT | M | Flying Lizard Motorsports | Darren Law
Seth Neiman | Porsche 911
GT3 RSR |
| 12 | 45 | GT | M | Flying Lizard Motorsports | Jörg Bergmeister
Patrick Long | Porsche 911
GT3 RSR |
| 13 | 61 | GT | M | Risi Competizione | Toni Vilander
Pierre Kaffer | Ferrari 430 GT |
| 14 | 62 | GT | M | Risi Competizione | Jaime Melo
Gianmaria Bruni | Ferrari 430 GT |
| 15 | 75 | GT | Y | Jaguar RSR | Paul Gentilozzi
Marc Goossens
Ryan Dalziel | Jaguar XKRS |
| 16 | 90 | GT | D | BMW Rahal Letterman
Racing Team | Dirk Müller
Joey Hand | BMW E92 M3 |
| 17 | 92 | GT | D | BMW Rahal Letterman
Racing Team | Bill Auberlen
Tommy Milner | BMW E92 M3 |
| 18 | 18 | GT | M | Extreme Speed Motorsports | Scott Sharp
Johannes van Overbeek | Ferrari 430 GT |
| 19 | 02 | GT | M | Extreme Speed Motorsports | Ed Brown
Guy Cosmo | Ferrari 430 GT |
| 20 | 36 | LMPC | M | Genoa Racing | Christian Zugel
Frankie Montecalvo | Oreca FLM09 |
| 21 | 52 | LMPC | M | PR1/Mathiasen Motorsports | Ricardo Gonzalez
Luis Diaz | Oreca FLM09 |
| 22 | 55 | LMPC | M | Level 5 Motorsports | Scott Tucker
Christophe Bouchut | Oreca FLM09 |
| 23 | 89 | LMPC | M | Intersport Racing | Kyle Marcelli
Chapman Ducote | Oreca FLM09 |
| 24 | 95 | LMPC | M | Level 5 Motorsports | Scott Tucker
Andy Wallace | Oreca FLM09 |
| 25 | 99 | LMPC | M | Green Earth Team Gunnar | Gunnar Jeannette
Elton Julian | Oreca FLM09 |
| 26 | 23 | GTC | Y | Alex Job Racing | Bill Sweedler
Mitch Pagerey | Porsche 911
GT3 Cup |
| 27 | 48 | GTC | Y | ORBIT/Paul Miller Racing | Bryce Miller
Luke Hines | Porsche 911
GT3 Cup |
| 28 | 54 | GTC | Y | Black Swan Racing | Tim Pappas
Jeroen Bleekemolen | Porsche 911
GT3 Cup |
| 29 | 63 | GTC | Y | TRG | Henri Richard
Andy Lally | Porsche 911
GT3 Cup |
| 30 | 88 | GTC | Y | Velox Motorsport | Shane Lewis
Jerry Vento | Porsche 911
GT3 Cup |
