| 01 | Pruett / Diaz / Dixon | CompUSA Chip Ganassi with Felix Sabates (USA) | Mike Hull | Riley | Mk XI | | Lexus | DP |
| 05 | Sigal / MacLeod / Kendall | Sigalsport BMW | | Pontiac | GTO.R | | Pontiac | GT |
| 09 | Goad / Camirand / Grégoire | Spirit of Daytona Racing (USA) | Troy Flis | Crawford | DP03 | | Pontiac | DP |
| 3 | Lewis / Stanton | Southard Motorsports | Steve Southard | Riley | Mk XI | | BMW | DP |
| 4 | Wallace / Leitzinger | Howard - Boss Motorsports | Maxwell Crawford | Crawford | DP03 | | Pontiac | DP |
| 5 | Finlay / Cameron / Valiante | Essex/Finlay Motorsports | Michael Gue | Crawford | DP03 | | Ford | DP |
| 6 | Frisselle / Borkowski / Frisselle | Playboy Racing/Mears-Lexus/Riley | Michael Shank | Riley | Mk XI | | Lexus | DP |
| 7 | Tuttle / MacLeod / Cochet | Tuttle Team Racing (USA) | Peter Baron | Riley | Mk XI | | Pontiac | DP |
| 8 | Russell / *Scrogham | Synergy Racing (USA) | Cole Scrogham | Doran | JE4 | | Porsche | DP |
| 10 | Taylor / Angelelli / Hunter-Reay | SunTrust Racing (USA) | Bill Riley | Riley | Mk XI | | Pontiac | DP |
| 11 | Duno / Goossens / Johansson | CITGO Racing by SAMAX | | Riley | Mk XI | | Pontiac | DP |
| 12 | Fernandez / Haberfeld / Meira | Lowe's Fernandez Racing | Tom Anderson | Riley | Mk XI | | Pontiac | DP |
| 17 | Lacey / Wilkins / Bell | SAMAX/Doncaster Racing (USA) | Peter Baron | Porsche | 997 GT3 Cup | | Porsche | GT |
| 19 | Gidley / McDowell / Cosmo | Playboy/Uniden Racing | Steve Cameron | Crawford | DP03 | | Ford | DP |
| 21 | Povoledo / Workman / O'Shaughnessy / Connolly | Matt Connolly Motorsports (USA) | Matt Connolly | BMW | M3 | E46 | BMW | GT |
| 23 | Rockenfeller / Kelleners / Borcheller | Alex Job Racing/Emory Motorsports | Alex Job | Crawford | DP03 | | Porsche | DP |
| 30 | Alhadeff / Auberlen / Moran, Jr. | Sigalsport BMW | Gene Sigal | Riley | Mk XI | | BMW | DP |
| 39 | Fittipaldi / Cheever, Jr. / Orsi | Crown Royal Special Reserve/Cheever | Eddie Cheever, Jr. | Crawford | DP03 | | Porsche | DP |
| 40 | Ruhlman / Bell / Dallenbach | Derhaag Motorsports (USA) | Chris Bingham | Riley | Mk XI | | Pontiac | DP |
| 47 | Morgan / Morgan / Zacharias | TruSpeed Motorsports | Rob Morgan | Riley | Mk XI | | Porsche | DP |
| 56 | Beachman / Fitzgerald / Salama | Beachman Racing | Bruce Beachman | Chevrolet | Corvette | Z06 | Chevrolet | GT |
| 57 | Riggins / Rice / Cicero | Stevenson Motorsports (USA) | John Stevenson | Chevrolet | Corvette | | Chevrolet | GT |
| 58 | Donohue / Law / Rice | Brumos Racing | | Riley | Mk XI | | Porsche | DP |
| 59 | France / Haywood / Moreno | Brumos Racing (USA) | James Bailie | Riley | Mk XI | | Porsche | DP |
| 60 | Patterson / Negri / Pruett | Michael Shank Racing | Michael Shank | Riley | Mk XI | | Lexus | DP |
| 62 | Pruitt / Wagner / Quaid | Corsa GT Motorsports | Steve Pruitt | Ferrari | F430 | Challenge | Ferrari | GT |
| 64 | Edwards / Collins / Wilson | TRG (USA) | Kevin Buckler | Pontiac | GTO.R | | Pontiac | GT |
| 65 | Bunting / Pumpelly / Lally / Edwards | TRG (USA) | Kevin Buckler | Pontiac | GTO.R | | Pontiac | GT |
| 66 | Pace / Lowe / Valentine | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 67 | Solley / Bullock / Gaffney | TRG (USA) | Kevin Buckler | Porsche | 997 GT3 Cup | | Porsche | GT |
| 72 | Henzler / Liddell / Davis | Tafel Racing | Tony Dowe | Porsche | 997 GT3 Cup | | Porsche | GT |
| 73 | Tafel / Davis / Henzler / Liddell | Tafel Racing (USA) | Tony Dowe | Porsche | 997 GT3 Cup | | Porsche | GT |
| 74 | Lux / James / Tafel | Tafel Racing (USA) | Tony Dowe | Porsche | 997 GT3 Cup | | Porsche | GT |
| 75 | Krohn / Said / Papis / *Bergmeister | Krohn Racing | Jeff Hazell | Riley | Mk XI | | Ford | DP |
| 76 | Bergmeister / Braun / Jönsson | Krohn Racing | Jeff Hazell | Riley | Mk XI | | Ford | DP |
| 77 | Jourdain / Brix / Servia | Feeds The Need/Doran Racing (USA) | Kevin Doran | Doran | JE4 | | Ford | DP |
| 78 | Kuttner / Ave / Gue | Doran Racing (USA) | Kevin Doran | Doran | JE4 | | Pontiac | DP |
| 80 | Keen / Murry | Shoes for Crews/Synergy Racing (USA) | Cole Scrogham | Porsche | 997 GT3 Cup | | Porsche | GT |
| 81 | Johnson / Nearn / *Russell | Comfort Systems/Synergy Racing (USA) | Cole Scrogham | Porsche | 997 GT3 Cup | | Porsche | GT |
| 89 | Figge / Dalziel / Empringham | Vonage/Playboy/Palms Casino | Tyler Tadevic | Riley | Mk XI | | Pontiac | DP |
| 99 | Gurney / Fogarty / Vasser | Gainsco/Blackhawk Racing (USA) | Bob Stallings | Riley | Mk XI | | Pontiac | DP |