| Nr | Piloto (PAÍS) | Motor/Carro | Cat. | Equipe |
| O1 | Scott Pruett (EUA) | Lexus Riley | DP | Chip Ganassi with Felix Sabates |
| 2 | Andy Wallace (ING)
Butch Leitzinger (EUA) | Pontiac Crawford | DP | Howard Motorsports |
| 5 | Bill Auberlen (EUA)
Matthew Alhadeff (EUA) | BMW Riley | DP | Sigalsport BMW |
| 6 | Henri Zogaib (EUA)
Ian James (EUA) | Lexus Riley | DP | Michael Shank Racing |
| 10 | Wayne Taylor (EUA)
Max Angelelli (ITA) | Pontiac Riley | DP | SunTrust Racing |
| 11 | Milka Duno (VEN)
Patrick Carpentier (EUA) | Pontiac Riley | DP | SAMAX Motorsport |
| 12 | Roger Schramm (EUA)
Jack Baldwin (EUA) | Pontiac Riley | DP | RVO Motorsports |
| 14 | Cory Friedman (EUA)
Hal Prewitt (EUA) | Porsche GT3 Cup | GT | Autometrics Motorsports |
| 15 | Cory Friedman (EUA)
Bransen Patch (EUA)
Mac McGehee (EUA)
Jim Hamblin (EUA) | Porsche GT3 Cup | GT | Autometrics Motorsports |
| 19 | Rob Finlay (EUA)
Michael Valiante (CAN) | Ford Crawford | DP | Finlay Motorsports |
| 20 | Andy Wallace (ING)
Butch Leitzinger (EUA) | Pontiac Crawford | DP | Howard Motorsports |
| 21 | Matt Connolly (EUA) | BMW M3 | GT | Matt Connolly Motorsports |
| 22 | Carlos de Quesada (EUA)
Scooter Gabel (EUA)
Jean-Francois Dumoulin (CAN) | Porsche GT3 Cup | GT | Alegra Motorsports/ Fiorano Racing |
| 23 | Patrick Long (EUA) | Porsche Crawford | DP | Alex Job Racing/ Emory Motorsports |
| 39 | Christian Fittipaldi (BRA)
Eddie Cheever Jr (EUA) | Porsche Crawford | DP | Cheever Racing |
| 41 | Joe Sahlen (EUA)
Will Nonnamaker (EUA)
Wayne Nonnamaker (EUA)
Joe Nonnamaker (EUA) | Porsche GT3 Cup | GT | Team Sahlen |
| 42 | Joe Sahlen (EUA)
Will Nonnamaker (EUA)
Wayne Nonnamaker (EUA)
Joe Nonnamaker (EUA) | Corvette | GT | Team Sahlen |
| 44 | Mike Solley (EUA)
RJ Valentine (EUA)
Pierre Bourque (CAN) | Porsche GT3 Cup | GT | TRG |
| 45 | Bryan Sellers (EUA) | Infinity G35 | GT | Team HLM |
| 47 | Charles Morgan (EUA)
Rob Morgan (EUA) | Porsche Riley | DP | TruSpeed Motorsports |
| 48 | Joe Sahlen (EUA)
Will Nonnamaker (EUA)
Wayne Nonnamaker (EUA)
Joe Nonnamaker (EUA) | Pontiac GTO | GT | Team Sahlen |
| 49 | Joe Sahlen (EUA)
Will Nonnamaker (EUA)
Wayne Nonnamaker (EUA)
Joe Nonnamaker (EUA) | Pontiac GTO | GT | Team Sahlen |
| 51 | Christian Fittipaldi (BRA) | Porsche Fabcar | DP | Cheever Racing |
| 58 | David Donohue (EUA)
Darren Law (EUA) | Porsche Riley | DP | Red Bull/ Brumos Porsche |
| 59 | Hurley Haywood (EUA)
JC France (EUA) | Porsche Riley | DP | Brumos Porsche |
| 60 | Mark Patterson (EUA)
Oswaldo Negri Jr (BRA) | Lexus Riley | DP | Michael Shank Racing |
| 65 | Scott Schroeder (EUA)
Duncan Ende (EUA)
Grant Maiman (EUA)
John Bibbo (EUA) | Porsche GT3 Cup | GT | TRG |
| 66 | Jim Lowe (EUA)
Jim Pace (EUA)
Murray Marden (EUA) | Porsche GT3 Cup | GT | TRG |
| 67 | Brent Milner (EUA)
John Peterson (EUA)
Michael Gomez (EUA) | Porsche GT3 Cup | GT | TRG |
| 68 | Bruce Dandrew (EUA) | Porsche GT3 Cup | GT | TRG |
| 70 | David Haskell (EUA)
Sylvain Tremblay (EUA)
Randy Pobst (EUA) | Mazda RX-8 | GT | SpeedSource |
| 72 | Wolf Henzler (ALE)
Eric Lux (EUA)
Jim Tafel (EUA) | Porsche GT3 Cup | GT | Tafel Racing |
| 75 | Tracy Krohn (EUA)
Nic Jonsson (SUE) | Pontiac Riley | DP | Krohn Racing |
| 76 | Colin Braun (EUA) | Pontiac Riley | DP | Krohn Racing |
| 77 | Fabrizio Gollin (ITA)
Jorge Goeters (MEX)
Forest Barber (EUA) | Ford Doran | DP | Doran Racing |
| 84 | George Robinson (EUA)
Paul Dallenbach (EUA)
Katherine Legge (ING) | Pontiac Riley | DP | Robinson Racing |
| 85 | Larry Bowman (EUA)
Don Bell (EUA)
Lance Willsley (EUA)
Shawn Price (EUA)
Dominik Farnbacher (ALE) | Porsche 997 | GT | Farnbacher Loles Motorsports |
| 86 | Christian Zugel (AUT)
John Burke (EUA)
Gunnar Jeannette (CAN)
Ryan Eversley (EUA)
Dominik Farnbacher (ALE) | Porsche 997 | GT | Farnbacher Loles Motorsports |
| 87 | Leh Keen (EUA)
Tom Pank (EUA)
Dino Loles (EUA)
Bryce Miller (EUA)
Craig Stanton (EUA) | Porsche 997 | GT | Farnbacher Loles Motorsports |
| 91 | Jim Matthews (EUA)
Marc Goossens (EUA) | Pontiac Riley | DP | Riley Motorsports |
