| 01 | Pruett / Rojas / Wilson / Papis | Chip Ganassi Racing with Felix Sabates (USA) | Mike Hull | Riley | Mk XX | | BMW | DP |
| 02 | Dixon / Montoya / Franchitti / McMurray | Chip Ganassi Racing with Felix Sabates (USA) | Mike Hull | Riley | Mk XX | | BMW | DP |
| 07 | Edwards / Jones / Russell / McCutchen / *Reese | Banner Racing | Leighton Reese | Chevrolet | Corvette | | Chevrolet | GT |
| 08 | Poordad / Sigal / West / Yasukawa | Sigalsport | Gene Sigal | Ferrari | F430 | Challenge | Ferrari | GT |
| 2 | Kapudija / Cameron / Beyer / Lueders / Wagner | Beyer Racing | Jon Baytos | Crawford | DP03 | | Chevrolet | DP |
| 6 | Patterson / Valiante / Allmendinger / Frisselle | Michael Shank Racing | Michael Shank | Riley | Mk XX | | Ford | DP |
| 7 | Lester / Forest / von Moltke / James | Starworks Motorsport | Peter Baron | Riley | Mk XI | | BMW | DP |
| 9 | Barbosa / Rockenfeller / Borcheller / Dalziel | Action Express Racing | Mike Evans | Riley | Mk XI | | Porsche | DP |
| 10 | Taylor / Lamy / Angelelli / Taylor | SunTrust Racing | Simon Hodgson | Dallara | DP01 | | Ford | DP |
| 14 | Thomas / Graeff / Yarab, Jr. / Gatlin | Autometrics Motorsports | Cory Friedman | Porsche | 997 GT3 Cup | | Porsche | GT |
| 18 | Ledoux / Quinlan / Sheehan / Doyle / Watkins | TRG/Guardian Angel (USA) | David Quinlan | Porsche | 997 GT3 Cup | | Porsche | GT |
| 19 | Breslin / Breslin / Romanini / Romagnoli / Vinkemulder | MCM/Black Flag Racing | Matt Connolly | Chevrolet | Corvette C6 | | Chevrolet | GT |
| 20 | Slingerland / Palttala / Menten / Lapierre | Matt Connolly Motorsports | Matt Connolly | Porsche | 997 GT3 Cup | | Porsche | GT |
| 21 | Steuer / Rosa / Trenery / Briody | Matt Connolly Motorsports | Matt Connolly | Pontiac | GTO.R | | Pontiac | GT |
| 22 | Bentley / McIntosh / Nierop / O'Young | Bullet Racing | Steve Paquette | Porsche | 997 GT3 Cup | | Porsche | GT |
| 23 | Burtin / Baldwin / Pagerey / Ragginger / Farnbacher | Alex Job Racing | Alex Job | Porsche | 997 GT3 Cup | | Porsche | GT |
| 30 | Taylor / Lamb / *Bocchino / *Buford | Racers Edge Motorsports | Jon Mirachi | Mazda | RX-8 | | Mazda | GT |
| 32 | Finlay / Westphal / Hyatt / Merrill | Corsa Team PR1 | Bobby Oergel | BMW | M6 | | BMW | GT |
| 40 | Foster / Espenlaub / Maxwell | Dempsey Racing | Joe Foster | Mazda | RX-8 | | Mazda | GT |
| 41 | Gue / Keen / Kitch / Lacey | Dempsey Racing/Team Seattle | Joe Foster | Mazda | RX-8 | | Mazda | GT |
| 42 | Sahlen / *Nonnamaker / *Nonnamaker / *Nonnamaker | Team Sahlen | Mike Thomas | Mazda | RX-8 | | Mazda | GT |
| 43 | Sahlen / Nonnamaker / Nonnamaker / Nonnamaker | Team Sahlen | Mike Thomas | Mazda | RX-8 | | Mazda | GT |
| 44 | Potter / Stanton / Lietz | Magnus Racing | John Potter | Porsche | 997 GT3 Cup | | Porsche | GT |
| 46 | Lewis / Zahn / Iannetta | Autohaus Motorsports | Theresa Conder | Pontiac | GXP.R | | Pontiac | GT |
| 48 | Miller / Ludwig / Roush | Miller Barrett Racing | Sylvia Proudfoot | Porsche | 997 GT3 Cup | | Porsche | GT |
| 52 | Michaelian / Schmidt / Castellano | Wil Mar Racing | Mario Crugnola | Ferrari | F430 | Challenge | Ferrari | GT |
| 55 | Tucker / Collard / Bouchut / Maassen | Crown Royal/NPN Racing | David Stone | Riley | Mk XX | | BMW | DP |
| 57 | Liddell / Davis / Magnussen | Stevenson Motorsports | John Stevenson | Chevrolet | Camaro | GT.R | Chevrolet | GT |
| 59 | Law / Donohue / Haywood / Matos | Brumos Racing (USA) | Mike Evans | Riley | Mk XI | | Porsche | DP |
| 60 | Pew / Negri / Frisselle / Wilkins | Michael Shank Racing | Michael Shank | Riley | Mk XX | | Ford | DP |
| 63 | Brown / Villeneuve / Richard / Thomas / Dean | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 64 | Sugden / *Lux | JLowe Racing | Jim Lowe | Porsche | 997 GT3 Cup | | Porsche | GT |
| 66 | Ballou / Collins / Flanagan / Henzler / Lally | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 67 | Bergmeister / Van Overbeek / Neiman / Long | TRG/ Flying Lizard Motorsports (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 69 | Assentato / Segal / Longhi / Lazzaro | SpeedSource | Sylvain Tremblay | Mazda | RX-8 | | Mazda | GT |
| 70 | Haskell / Tremblay / Ham / Bomarito | SpeedSource | Sylvain Tremblay | Mazda | RX-8 | | Mazda | GT |
| 71 | George, Jr. / Pumpelly / Bernhard / Dumas / Labonte | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 75 | Krohn / Jönsson / Zonta / Braun | Krohn Racing | David Brown | Lola | B08/70 | | Ford | DP |
| 77 | Gidley / Jaeger / Gollin / Johnston | Doran Racing (USA) | Kevin Doran | Dallara | DP01 | | Ford | DP |
| 88 | Willsley / Papadopoulos / Baker / Mowlem / Cosmo | Orbit Racing | Rodger Hawley | Porsche | 997 GT3 Cup | | Porsche | GT |
| 90 | Garcia / Manning / Rice / Menard | Spirit of Daytona Racing | Troy Flis | Coyote | CC/09 | | Porsche | DP |
| 94 | Auberlen / Said / Dalla Lana / Hand | Turner Motorsport | | BMW | M6 | | BMW | GT |
| 95 | Tucker / Hunter-Reay / Luhr / Westbrook | Crown Royal/NPN Racing | David Stone | Riley | Mk XX | | BMW | DP |
| 97 | Schaldach / Borkowski / Bell / Refenning | Stevenson Motorsports | John Stevenson | Chevrolet | Camaro | GT.R | Chevrolet | GT |
| 99 | Gurney / Fogarty / Vasser / Johnson | GAINSCO/Bob Stallings Racing | Bob Stallings | Riley | Mk XX | | Chevrolet | DP |