| 01 | Franchitti / Pruett / Rojas / Wilson | Chip Ganassi Racing with Felix Sabates (USA) | Mike Hull | Riley | Mk XX | BMW | DP |
| 02 | Dixon / Franchitti / McMurray / Montoya | Chip Ganassi Racing with Felix Sabates (USA) | Mike Hull | Riley | Mk XX | BMW | DP |
| 07 | Edwards / Jones / McCutchen / Reese / Russell | Godstone Ranch Motorsports/Team MBR | Leighton Reese | Chevrolet | Corvette | Chevrolet | GT |
| 6 | Allmendinger / Frisselle / Patterson / Valiante | Michael Shank Racing | Michael Shank | Riley | Mk XX | Ford | DP |
| 7 | Andersen / Forest / Lester / von Moltke | Starworks Motorsport | Peter Baron | Riley | Mk XI | BMW | DP |
| 9 | Barbosa / Dalziel / Borcheller / Rockenfeller | Action Express Racing | Mike Evans | Riley | Mk XI | Porsche | DP |
| 10 | Lamy / Angelelli / Taylor / Taylor | SunTrust Racing | Simon Hodgson | Dallara | DP01 | Ford | DP |
| 14 | Baum / Friedman / Gatlin / Graeff / Yarab, Jr. | Autometrics Motorsports | Cory Friedman | Porsche | 997 GT3 Cup | Porsche | GT |
| 18 | Bassett / Doyle / Hill / Ledoux / Quinlan | TRG/Guardian Angel (USA) | David Quinlan | Porsche | 997 GT3 Cup | Porsche | GT |
| 20 | Lapierre / Palttala / Menten / Slingerland | Matt Connolly Motorsports | Matt Connolly | Porsche | 997 GT3 Cup | Porsche | GT |
| 21 | Casadei / London / Rosa | Matt Connolly Motorsports | Matt Connolly | Pontiac | GTO.R | Pontiac | GT |
| 23 | Baldwin / Burtin / Farnbacher / Pagerey / Ragginger | Alex Job Racing | Alex Job | Porsche | 997 GT3 Cup | Porsche | GT |
| 30 | Bocchino / Buford / Lamb / Taylor | Racers Edge Motorsports | Jon Mirachi | Mazda | RX-8 | Mazda | GT |
| 32 | | Corsa Team PR1 | Bobby Oergel | BMW | M6 | BMW | GT |
| 33 | Bentley / McIntosh / Nierop / O'Young / Paquette | Bullet Racing | | Porsche | 997 GT3 Cup | Porsche | GT |
| 40 | Dempsey / Espenlaub / Foster / 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 | Nonnamaker / Sahlen / Nonnamaker / Nonnamaker | Team Sahlen | Mike Thomas | Mazda | RX-8 | Mazda | GT |
| 43 | Nonnamaker / Sahlen / Nonnamaker / Nonnamaker | Team Sahlen | Mike Thomas | Mazda | RX-8 | Mazda | GT |
| 44 | Bleekemolen / Potter / Stanton | Magnus Racing | John Potter | Porsche | 997 GT3 Cup | Porsche | GT |
| 46 | Iannetta / Lewis / Zahn | Autohaus Motorsports | Theresa Conder | Pontiac | GXP.R | Pontiac | GT |
| 48 | Hines / Ludwig / Miller / Roush | Miller Barrett Racing | Sylvia Proudfoot | Porsche | 997 GT3 Cup | Porsche | GT |
| 55 | Bouchut / Collard / Bourdais / Maassen / Tucker | Crown Royal/NPN Racing | David Stone | Riley | Mk XX | BMW | DP |
| 57 | Davis / Liddell / Magnussen | Stevenson Motorsports | John Stevenson | Chevrolet | Camaro | Chevrolet | GT |
| 59 | Donohue / Haywood / Law / Leitzinger / Matos | Brumos Racing (USA) | Mike Evans | Riley | Mk XI | Porsche | DP |
| 60 | Negri / Pew / Frisselle / Wilkins | Michael Shank Racing | Michael Shank | Riley | Mk XX | Ford | DP |
| 63 | Brown / Dean / Richard / Thomas / Villeneuve | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | Porsche | GT |
| 64 | Lowe / Lux / Pace / Sugden / Walker | 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 / Lazzaro / Longhi / Segal | SpeedSource | Sylvain Tremblay | Mazda | RX-8 | Mazda | GT |
| 70 | Bomarito / Ham / Haskell / Tremblay | SpeedSource | Sylvain Tremblay | Mazda | RX-8 | Mazda | GT |
| 71 | Pumpelly / Bernhard / Buckler / Dumas / Labonte / George, Jr. | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | Porsche | GT |
| 75 | Braun / Jönsson / Krohn / Zonta | Krohn Racing | David Brown | Lola | B08/70 | Ford | DP |
| 77 | Gidley / Gollin / Johnston | Doran Racing (USA) | Kevin Doran | Dallara | DP01 | Ford | DP |
| 88 | Baker / Cosmo / Mowlem / Papadopoulos / Willsley | Orbit Racing | Rodger Hawley | Porsche | 997 GT3 Cup | Porsche | GT |
| 90 | Garcia / Manning / Menard / Rice | Spirit of Daytona Racing | Troy Flis | Coyote | CC/09 | Porsche | DP |
| 94 | Auberlen / Dalla Lana / Hand / Said | Turner Motorsport | | BMW | M6 | BMW | GT |
| 95 | Bouchut / Hunter-Reay / Luhr / Tucker / Westbrook | Crown Royal/NPN Racing | David Stone | Riley | Mk XX | BMW | DP |
| 97 | Bell / Borkowski / Refenning / Schaldach | Stevenson Motorsports | John Stevenson | Chevrolet | Camaro | Chevrolet | GT |
| 99 | Gurney / Fogarty / Johnson / Vasser | GAINSCO/Bob Stallings Racing | Bob Stallings | Riley | Mk XX | Chevrolet | DP |