| 01 | Pruett / Rojas / Rahal / Hand | Chip Ganassi Racing with Felix Sabates (USA) | Mike Hull | Riley | Mk XXVI | | BMW | DP |
| 02 | Dixon / Montoya / Franchitti / McMurray | Chip Ganassi Racing with Felix Sabates (USA) | Mike Hull | Riley | Mk XXVI | | BMW | DP |
| 03 | Sharp / Brown / Van Overbeek / Cosmo | Extreme Speed Motorsports | Scott Sharp | Ferrari | 458 | Italia Grand-Am | Ferrari | GT |
| 2 | Valiante / Hunter-Reay / Andretti / Mayer | Starworks Motorsport | Peter Baron | Riley | Mk XX | | Ford | DP |
| 4 | Yarab, Jr. / Graeff / Eversley / Bell | Magnus Racing | John Potter | Porsche | 997 GT3 Cup | | Porsche | GT |
| 5 | Law / Donohue / Fittipaldi | Action Express Racing | Robert Johnson | Chevrolet | Corvette DP | | Chevrolet | DP |
| 6 | McDowell / Nasr / Goncalvez / Yacaman | Michael Shank Racing with Curb-Agajanian | Michael Shank | Riley | Mk XX | | Ford | DP |
| 8 | Potolicchio / Popow / Dalziel / Luhr / McNish | Starworks Motorsport | Peter Baron | Riley | Mk XXVI | | Ford | DP |
| 9 | France / Barbosa / Borcheller / Papis | Action Express Racing | Robert Johnson | Chevrolet | Corvette DP | | Chevrolet | DP |
| 10 | Angelelli / *Briscoe / *Taylor | SunTrust Racing | Simon Hodgson | Chevrolet | Corvette DP | | Chevrolet | DP |
| 12 | Rettich / Miller / Prewitt / Schneider / Shoff | Alliance Autosport | Scott Rettich | Porsche | 997 GT3 Cup | | Porsche | GT |
| 15 | Earnhardt / Cook / Harrington / Hill / Ware | Rick Ware Racing | Rick Ware | Ford | Mustang | Boss 302 R | Ford | GT |
| 17 | Ragginger / Baldwin / Burtin / Sellers / Asch | Burtin Racing | Claudio Burtin | Porsche | 997 GT3 Cup | | Porsche | GT |
| 18 | Thomas / Lester / McCutchen / Jones | Muehlner Motorsports | Bernard Muehlner | Porsche | 997 GT3 Cup | | Porsche | GT |
| 19 | Whitis / O'Doski / Nater / Dollahite / Seefried | Muehlner Motorsports America | Bernhard Muehlner | Porsche | 997 GT3 Cup | | Porsche | GT |
| 20 | Murry / Schaldach / Engstler / Buford | Liqui Moly Team Englster/Mitchum Motorsports Porsche | Chris Mitchum | Porsche | 997 GT3 Cup | | Porsche | GT |
| 22 | Blaylock / O'Young / Roush / White / Van Blankers | Bullet Racing | Steve Paquette | Porsche | 997 GT3 Cup | | Porsche | GT |
| 23 | MacNeil / Collard / Leitzinger / Holzer | Alex Job Racing (USA) | Alex Job | Porsche | 997 GT3 Cup | | Porsche | GT |
| 24 | Faieta / Wagner / Avenatti / Sweedler / Poordad | Alex Job Racing | Alex Job | Porsche | 997 GT3 Cup | | Porsche | GT |
| 26 | Edwards / Kauffmann / Cisneros / Tandy | NGT Motorsport | Ramez Wahab | Porsche | 997 GT3 Cup | | Porsche | GT |
| 32 | Armindo / Lewis / Curtis / Sofronas / *Willsey | Orbit/GMG | Rodger Hawley | Porsche | 997 GT3 Cup | | Porsche | GT |
| 34 | DeFontes / Konôpka / Fogg / Vonka / Van De Laar | Orbit/GMG | | Porsche | 997 GT3 Cup | | Porsche | GT |
| 36 | Hacquard / Andretti / Krohn / Andretti | Yellow Dragon Motorsports | Jack Smith | Mazda | RX-8 | | Mazda | GT |
| 40 | Foster / Dempsey / Long / Espenlaub / Putman | Dempsey Racing | Joe Foster | Mazda | RX-8 | | Mazda | GT |
| 41 | Kitch / Rogers / Johnson / Maxwell / James | Dempsey Racing | Joe Foster | Mazda | RX-8 | | Mazda | GT |
| 42 | Nonnamaker / Cameron / Nonnamaker / Nonnamaker | Team Sahlen | Jon Chapman | Mazda | RX-8 | | Mazda | GT |
| 43 | Nonnamaker / *Nonnamaker / *Nonnamaker | Team Sahlen | Jon Chapman | Mazda | RX-8 | | Mazda | GT |
| 44 | Potter / Lally / Rast / Lietz | Magnus Racing | John Potter | Porsche | 997 GT3 Cup | | Porsche | GT |
| 45 | Bergmeister / Long / Rockenfeller / Neiman | Flying Lizard Motorsports with Wright Motorsports | Eric Ingraham | Porsche | 997 GT3 Cup | | Porsche | GT |
| 46 | Mason / Fumal / Baughman / Nowicki / Breukers | Michael Baughman Racing | Michael Baughman | Chevrolet | Corvette | | Chevrolet | GT |
| 48 | Miller / Maassen / Bell / Wilkins | Paul Miller Racing | Paul Miller | Porsche | 997 GT3 Cup | | Porsche | GT |
| 49 | Nonnamaker / Nonnamaker / Nonnamaker / Sahlen | Team Sahlen | Jon Chapman | Mazda | RX-8 | | Mazda | GT |
| 50 | Defoor / Forbes-Robinson / Johnson / Pace / de Quesada | 50+Predator/Alegra | Byron Defoor | Riley | Mk XI | | BMW | DP |
| 51 | Pirro / Baas / Canache / von Moltke / Norman | APR Motorsport | Jeff Mishtawy | Audi | R8 LMS | Grand-Am | Audi | GT |
| 55 | Grunnet / Del Vecchio / McKee / Pobst / Kester | Acumen Motorsport | Douglas Grunnet | Porsche | 997 GT3 Cup | | Porsche | GT |
| 56 | Kauffman / Waltrip / Pastrana / Aguas | AF - Waltrip (I) | Amato Ferrari | Ferrari | 458 | Italia Grand-Am | Ferrari | GT |
| 57 | Liddell / Edwards / Bremer | Stevenson Motorsports | John Stevenson | Chevrolet | Camaro | GT.R | Chevrolet | GT |
| 59 | Keen / Davis / Haywood / Lieb | Brumos Racing | Donald Schinsing | Porsche | 997 GT3 Cup | | Porsche | GT |
| 60 | Pew / Negri / Allmendinger / Wilson | Michael Shank Racing with Curb-Agajanian | Michael Shank | Riley | Mk XXVI | | Ford | DP |
| 62 | Matos / Bruni / *Fisichella | Risi Competizione | Ronald Vogel II | Ferrari | 458 | Italia Grand-Am | Ferrari | GT |
| 63 | Vilander / Bertolini / Beretta | Risi Competizione with American Canadian | Giuseppe Risi | Ferrari | 458 | Italia Grand-Am | Ferrari | GT |
| 64 | Ardagna / Costabal / Di Guida / Salazar / Orjuela | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 65 | Cox / Hedlund / McCarthy / Michaelian / Castellano | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 66 | Farnbacher / Keating / Pilet / Simonsen | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 67 | Pumpelly / Bertheau / Goossens / Henzler / Bleekemolen | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 68 | Cumming / Keating / Faulkner / Gomez / Estre | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 69 | Assentato / Segal / Longhi / Lazzaro | AIM Autosport Team FXDD with Ferrari | Ian Willis | Ferrari | 458 | Italia Grand-Am | Ferrari | GT |
| 70 | Hinchcliffe / Tremblay / Bomarito / Franchitti | SpeedSource | Sylvain Tremblay | Mazda | RX-8 | | Mazda | GT |
| 74 | Al Masaood / Kane / Al Mehairi | Oryx Racing | Humaid Al Masaood | Audi | R8 LMS | Grand-Am | Audi | GT |
| 75 | Carter / Plumb / Bell / Curran | Stevenson Motorsports | John Stevenson | Chevrolet | Camaro | GT.R | Chevrolet | GT |
| 76 | Krohn / Jönsson / Zonta / Braun | Krohn Racing | David Brown | Lola | B08/70 | | Ford | DP |
| 77 | Frisselle / Lowe / Frisselle / Tracy / Johnson | Doran Racing (USA) | Kevin Doran | Dallara | DP01 | | Ford | DP |
| 82 | Fergus / Greer / Finger / Hotchkis / Trinkler | Dick Greer Racing | Dick Greer | Porsche | 997 GT3 Cup | | Porsche | GT |
| 87 | Valverde / Soulet / Heylen / Ave / *Peterson | Racers Edge Motorsports | Jon Mirachi | Dodge | Viper | | Dodge | GT |
| 88 | Taylor / Edwards / Marsh / Milner | Autohaus Motorsports | Theresa Conder | Chevrolet | Camaro | GT.R | Chevrolet | GT |
| 90 | Garcia / Westbrook / Gavin / Magnussen | Spirit of Daytona Racing | Troy Flis | Chevrolet | Corvette DP | | Chevrolet | DP |
| 93 | Auberlen / Müller / Marsal / Dalla Lana / Werner | Turner Motorsport | Will Turner | BMW | M3 | | BMW | GT |
| 94 | Said / Johnson / Dalla Lana / *Müller / *Auberlen | Turner Motorsport | Will Turner | BMW | M3 | | BMW | GT |
| 99 | Gurney / Fogarty / Gidley | GAINSCO/Bob Stallings Racing | Bob Stallings | Chevrolet | Corvette DP | | Chevrolet | DP |