| | No. | Class | T | Fuel | Team | Driver | Car |
| 1 | 6 | P1 | M | E-10 | Muscle Milk Pickett Racing | Lucas Luhr
Klaus Graf | HPD ARX-03a |
| 2 | 16 | P1 | D | Isobutanol | Dyson Racing | Chris Dyson
Guy Smith | Lola B12/60 Mazda |
| 3 | 20 | P1 | D | Isobutanol | Dyson Racing | Michael Marsal
Mark Patterson | Lola B11/66 Mazda |
| 4 | 37 | P2 | D | E-10 | Conquest Endurance | Martin Plowman
David Heinemeier Hansson | Morgan Nissan |
| 5 | 95 | P2 | D | E-10 | Level 5 Motorsports | Scott Tucker
Luis Diaz
Ricardo Gonzalez | HPD ARX-03b Honda |
| 6 | 055 | P2 | D | E-10 | Level 5 Motorsports | Scott Tucker
Christophe Bouchut | HPD ARX-03b Honda |
| 7 | 3 | GT | M | E-85 | Corvette Racing | Jan Magnussen
Antonio Garcia | Chevrolet Corvette C6 ZR1 |
| 8 | 4 | GT | M | E-85 | Corvette Racing | Oliver Gavin
Tommy Milner | Chevrolet Corvette C6 ZR1 |
| 9 | 17 | GT | F | E-85 | Team Falken Tire | Wolf Henzler
Bryan Sellers | Porsche 997 GT3 RSR |
| 10 | 23 | GT | Y | E-10 | Lotus/Alex Job Racing | Bill Sweedler
Townsend Bell | Lotus Evora |
| 11 | 44 | GT | M | E-85 | Flying Lizard Motorsports | Seth Neiman
Marco Holzer | Porsche 997 GT3 RSR |
| 12 | 45 | GT | M | E-85 | Flying Lizard Motorsports | Jörg Bergmeister
Pat Long | Porsche 997 GT3 RSR |
| 13 | 48 | GT | D | E-85 | Paul Miller Racing | Bryce Miller
Sascha Maassen | Porsche 997 GT3 RSR |
| 14 | 55 | GT | D | E-85 | BMW Team RLL | Jörg Müller
Bill Auberlen | BMW E92 M3 |
| 15 | 56 | GT | D | E-85 | BMW Team RLL | Jonathan Summerton
Dirk Müller | BMW E92 M3 |
| 16 | 01 | GT | M | E-85 | Extreme Speed Motorsports | Scott Sharp
Johannes van Overbeek | Ferrari 458 Italia |
| 17 | 02 | GT | M | E-85 | Extreme Speed Motorsports | Ed Brown
Guy Cosmo | Ferrari 458 Italia |
| 18 | 7 | PC | M | E-10 | Merchant Services Racing | Tony Burgess
Pablo Sanchez
Eric Lux | Oreca FLM09 |
| 19 | 8 | PC | M | E-10 | Merchant Services Racing | Kyle Marcelli
Lucas Downs | Oreca FLM09 |
| 20 | 9 | PC | M | E-10 | RSR Racing | Bruno Junqueira
Tomy Frissi | Oreca FLM09 |
| 21 | 25 | PC | M | E-10 | Dempsey Racing | Henri Richard
Duncan Ende | Oreca FLM09 |
| 22 | 52 | PC | M | E-10 | PR1 Mathiasen Motorsports | Rudy Junco
Marino Franchitti | Oreca FLM09 |
| 23 | 05 | PC | M | E-10 | CORE Autosport | Jonathan Bennett
Colin Braun | Oreca FLM09 |
| 24 | 06 | PC | M | E-10 | CORE Autosport | Alex Popow
Tom Kimber-Smith | Oreca FLM09 |
| 25 | 11 | GTC | Y | E-10 | JDX Racing | Chris Cumming
Michael Valiante | Porsche 911 GT3 Cup |
| 26 | 22 | GTC | Y | E-10 | Alex Job Racing | Cooper MacNeil
Leh Keen | Porsche 911 GT3 Cup |
| 27 | 24 | GTC | Y | E-10 | Competition Motorsports | Bob Faieta
Michael Avenatti | Porsche 911 GT3 Cup |
| 28 | 30 | GTC | Y | E-10 | NGT Motorsport | Henrique Cisneros
Jeroen Bleekemolen | Porsche 911 GT3 Cup |
| 29 | 31 | GTC | Y | E-10 | NGT Motorsport | Angel Andres Benitez Jr
Angel Andres Benitez Sr | Porsche 911 GT3 Cup |
| 30 | 34 | GTC | Y | E-10 | Green Hornet Racing | Peter LeSaffre
Damien Faulkner | Porsche 911 GT3 Cup |
| 31 | 66 | GTC | Y | E-10 | TRG | Emilio Di Guida
Spencer Pumpelly | Porsche 911 GT3 Cup |
