| 01 | Sharp / Van Overbeek | Extreme Speed Motorsports | Scott Sharp | Ferrari | F430 | GTC | Ferrari | GT |
| 02 | Cosmo / Brown | Extreme Speed Motorsports | Scott Sharp | Ferrari | F430 | GTC | Ferrari | GT |
| 1 | Pagenaud / Brabham / Franchitti | Patrón Highcroft Racing (USA) | | HPD | ARX-01 | c | HPD | LMP |
| 3 | Magnussen / O'Connell | Corvette Racing (USA) | | Chevrolet | Corvette C6 | .R ZR1 | Chevrolet | GT |
| 4 | Gavin / Beretta | Corvette Racing (USA) | | Chevrolet | Corvette C6 | .R ZR1 | Chevrolet | GT |
| 6 | Graf / Gidley / Maassen | Muscle Milk Team Cytosport (USA) | | Porsche | RS Spyder | Evo | Porsche | LMP |
| 8 | Cocker / Drayson / *Pirro | Drayson Racing (GB) | | Lola | B09/60 | | Judd | LMP |
| 12 | Ehret / Willman / Burgess | Autocon Motorsports (USA) | | Lola | B06/10 | | AER | LMP |
| 16 | Meyrick / Dyson / Smith | Dyson Racing Team (USA) | | Lola | B09/80 | -86 | Mazda | LMP |
| 17 | Henzler / Sellers | Team Falken Tire | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 23 | Sweedler / Lueders / Kapudija | Alex Job Racing | Alex Job | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 28 | Baron / Beggs | 911 Design | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 32 | Sofronas / Curtis / *Borcheller | GMG Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 36 | Marcelli / Weickardt / Sutherland | Genoa Racing | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 37 | Field / *Field / *Konstant | Intersport Racing (USA) | | Lola | B06/10 | | AER | LMP |
| 40 | Murry / Robertson / Robertson | Robertson Racing (USA) | | Ford | GT | -R Mk.7 | Ford | GT |
| 44 | Neiman / Law / Bernhard | Flying Lizard Motorsports (USA) | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 45 | Bergmeister / Long | Flying Lizard Motorsports (USA) | | Porsche | 997 GT3 RSR | | Porsche | GT |
| 48 | Miller / McMullen / Hines | Orbit Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 52 | Papadopoulos / Mowlem / *Lewis | PR1/Mathiasen Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 54 | Bleekemolen / Bleekemolen / Pappas | Black Swan Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 55 | Bouchut / Tucker / Wilkins | Level 5 Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 61 | Jönsson / Krohn | Risi Competizione (USA) | | Ferrari | F430 | GTC | Ferrari | GT |
| 62 | Melo / Bruni | Risi Competizione | | Ferrari | F430 | GTC | Ferrari | GT |
| 63 | Lally / Villeneuve / Richard | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 69 | Bieker / Rodriguez / *Wilson | Werks II Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 75 | Goossens / Dalziel | Jaguar RSR (USA) | | Jaguar | XKR | -S | Jaguar | GT |
| 80 | Gonzalez / Diaz / *Junco, Jr. | Car Amigo - Alex Job Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 81 | Gonzalez / Leitzinger / Junco, Jr. | Alex Job Racing | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 88 | Lewis / Aschenbach | Velox Motorsports | | Porsche | 997 GT3 Cup | | Porsche | GTC |
| 89 | Wong / Ducote / Pagerey | Intersport Racing | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 90 | Hand / Müller | BMW Rahal Letterman Racing Team (USA) | | BMW | M3 | E92 GT | BMW | GT |
| 92 | Auberlen / Milner | BMW Rahal Letterman Racing Team (USA) | | BMW | M3 | E92 GT | BMW | GT |
| 95 | Tucker / *Wallace / *Frisselle | Level 5 Motorsports | | Oreca | FLM 09 | | Chevrolet | LMPC |
| 99 | Julian / Zugel / Jeannette | Green Earth Team Gunnar | | Oreca | FLM 09 | | Chevrolet | LMPC |