| # | Pilotos (PAÍSES) | Carro | Cat. | Equipe |
| 00 | James Thomason (EUA)
Ron Zitza (EUA)
Tim Lewis Jr (EUA)
Kevin Wheeler (EUA) | Porsche GT3 Cup | GT | TZ Motorsports |
| 01 | Scott Pruett (EUA)
Luis Diaz (MEX)
Max Papis (ITA) | Lexus Riley | DP | CompUSA Chip Ganassi with Felix Sabates |
| 2 | Rusty Wallace (EUA)
Danica Patrick (EUA)
Allan McNish (ESC) | Pontiac Crawford | DP | Howard - Boss Motorsports |
| 02 | Scott Dixon (NZL)
Dan Wheldon (ING)
Casey Mears (EUA) | Lexus Riley | DP | Target Chip Ganassi with Felix Sabates |
| 3 | Shane Lewis (EUA)
Kris Szekeres (EUA) | BMW Riley | DP | Southard Motorsports |
| 4 | Andy Wallace (ING)
Butch Leitzinger (EUA)
Tony Stewart (EUA) | Pontiac Crawford | DP | Howard - Boss Motorsports |
| 04 | Gene Sigal (EUA)
Peter MacLeod (EUA) | BMW M3 | GT | Sigalsport BMW |
| 5 | Duncan Dayton (EUA)
Rick Knoop (EUA)
Brian DeVries (EUA)
Jim Matthews (EUA)
James Gue (EUA) | Ford Crawford | DP | Essex Racing |
| 05 | Matthew Alhadeff (EUA)
Bill Auberlen (EUA)
Tom Milner (EUA)
Justin Marks (EUA) | BMW M3 | GT | Sigalsport BMW |
| 6 | Ken Wilden (CAN)
Paul Mears Jr (EUA)
Mike Borkowski (EUA)
Paul Tracy (CAN) | Lexus Riley | DP | Graydon Elliott Fusion Racing with MSR |
| 06 | Leighton Reese (EUA)
Tommy Archer (EUA)
Russ Oasis (EUA)
Dino Crescentini (EUA) | Corvette | GT | Banner Racing |
| 7 | Milka Duno (VEN)
Dario Franchitti (ESC)
Marino Franchitti (ESC)
Kevin McGarrity (IRL) | Pontiac Riley | DP | CITGO Racing by SAMAX |
| 8 | Burt Frisselle (EUA)
Brian Frisselle (EUA)
Patrick Huisman (HOL) | Porsche Doran | DP | Rx.com/ Synergy Racing |
| 08 | Steve Goldin (EUA)
Keith Goldin (EUA)
Scott Finlay (EUA) | Mazda RX-8 | GT | Goldin Brothers Racing |
| 09 | Doug Goad (EUA) | Pontiac Crawford | DP | Spirit of Daytona Racing |
| 10 | Wayne Taylor (EUA)
Max Angelelli (ITA)
Emmanuel Collard (FRA)
Ryan Briscoe (AUT) | Pontiac Riley | DP | SunTrust Racing |
| 11 | Brian Tuttle (EUA) | BMW Riley | DP | Tuttle Team Racing/ SAMAX |
| 12 | Adrian Fernandez (MEX)
Mario Haberfeld (BRA)
Scott Sharp (EUA) | Pontiac Riley | DP | Lowe's Fernandez Racing |
| 14 | Patrick Small (EUA)
Mac McGehee (EUA)
Tory Herring (EUA)
Bill Martin (EUA)
Cory Friedman (EUA) | Porsche GT3 Cup | GT | Autometrics Motorsports |
| 16 | Chris Dyson (EUA)
Rob Dyson (EUA)
Oliver Gavin (ING)
Guy Smith (ING) | Pontiac Crawford | DP | Howard - Boss Motorsports |
| 17 | Lance Arnold (ALE)
Johnny Mowlem (ING)
Bryan Sellers (EUA)
David Shep (CAN)
Jan Seyffarth (ALE) | Porsche GT3 Cup | GT | SAMAX |
| 19 | Memo Gidley (EUA)
Michael McDowell (EUA)
Alex Barron (EUA) | Ford Crawford | DP | Playboy/ Uniden Racing |
| 21 | Gerald Van Uitert (EUA)
Matt Connolly (EUA)
Carlos de Quesada (EUA)
Rick Sutherland (EUA)
Tom Sutherland (EUA) | BMW M3 | GT | Matt Connolly Motorsports |
| 22 | Emil Assentato (EUA)
Nick Longhi (EUA)
Jean-Francois Dumoulin (CAN)
Lonnie Pechnik (EUA) | Porsche GT3 Cup | GT | Fiorano Racing |
| 23 | Mike Rockenfeller (ALE)
Patrick Long (EUA)
Lucas Luhr (ALE) | Porsche Crawford | DP | Alex Job Racing/ Emory Motorsports |
| 24 | Brian O'Shaughnessy (EUA)
Bill Cotter (EUA)
Tom Malloy (EUA)
Jacob Shalit (EUA) | BMW M3 | GT | Matt Connolly Motorsports |
| 25 | ?? | Pontiac GTO.R | GT | Team GTO.R |
| 28 | Rob Finlay (EUA)
Michael Valiante (CAN)
Bryan Herta (EUA)
Buddy Rice (EUA) | Ford Crawford | DP | Finlay Motorsports |
| 29 | Squeak Kennedy (EUA)
Anthony Puleo (EUA) | Nissan 350Z | GT | Xtreme Motorsports Group |
| 32 | Blake Rosser (EUA) | Porsche GT3 Cup | GT | Unitech Racing |
| 36 | Michael Levitas (EUA)
Randy Pobst (EUA)
Ian Baas (EUA)
Spencer Pumpelly (EUA) | Porsche GT3 Cup | GT | TPC Racing |
| 39 | Eddie Cheever Jr (EUA)
Christian Fittipaldi (BRA)
Patrick Carpentier (CAN) | Lexus Crawford | DP | Cheever Racing |
| 40 | Chris Bingham (EUA)
Randy Ruhlman (EUA)
Ron Fellows (EUA) | Pontiac Riley | DP | Derhaag Motorsports |
| 41 | Joe Nonnamaker (EUA)
Wayne Nonnamaker (EUA)
Will Nonnamaker (EUA)
Victor Gonzalez Jr (PRI) | Porsche GT3 Cup | GT | Team Sahlen |
| 42 | ?? | Porsche GT3 Cup | GT | Team Sahlen |
| 43 | Wes Allen (EUA)
Eddie Hennessy (EUA)
Jim Michaelian (EUA)
Manuel Matos (PRI) | Porsche GT3 Cup | GT | Team Sahlen |
| 46 | Michael Baughman (EUA)
Ray Mason (EUA)
John Connolly (EUA)
Frank Del Vecchio (EUA) | Corvette | GT | Michael Baughman Racing |
| 48 | Hans Hauser (SUI)
Robert Dubler (SUI)
Toni Seiler (SUI)
Michael DeFontes (SUI) | Corvette | GT | WTF Engineering |
| 50 | Henri Zogaib (EUA)
Ian James (EUA)
Tom Nastasi (EUA)
Chris Gleason (EUA) | Ford Crawford | DP | Blackforest Motorsports |
| 51 | Thomas Erdos (BRA)
Mike Newton (ING)
Warren Hughes (ING)
Stefan Johansson (SUE) | Lexus Crawford | DP | Cheever Racing |
| 52 | Luis Monzon (ESP)
Costantino Bertuzzi (ITA)
Bo McCormick (ING) | Ferrari 360GT | GT | Mastercar |
| 55 | Zach Arnold (EUA)
Ken MacAlpine (CAN)
Johnny Miller (EUA) | Corvette | GT | ASC Motorsports |
| 57 | Tommy Riggins (EUA)
Vic Rice (EUA)
John Stevenson (EUA) | Corvette | GT | Stevenson Motorsports |
| 58 | David Donohue (EUA)
Darren Law (EUA)
Sascha Maassen (ALE) | Porsche Fabcar | DP | Red Bull/ Brumos Porsche |
| 59 | Hurley Haywood (EUA)
JC France (EUA)
Ted Christopher (EUA)
João Barbosa (POR) | Porsche Fabcar | DP | Brumos Racing |
| 60 | Mark Patterson (EUA)
Oswaldo Negri Jr (BRA)
AJ Allmendinger (EUA)
Justin Wilson (ING) | Lexus Riley | DP | Michael Shank Racing |
| 63 | Dennis Spencer (EUA)
Scott Spencer (EUA)
Roger Mandeville (EUA)
Rich Grupp (EUA)
Gary Drummond (EUA) | Mazda RX-8 | GT | Team Spencer Motorsports |
| 64 | Paul Edwards (EUA)
Kelly Collins (EUA)
Jan Magnussen (DIN)
Andy Pilgrim (EUA) | Pontiac GTO.R | GT | TRG |
| 65 | Andy Lally (EUA)
Marc Bunting (EUA)
RJ Valentine (EUA)
Johnny O'Connell (EUA) | Pontiac GTO.R | GT | TRG |
| 66 | Steve Johnson (EUA)
Robert Nearn (ING)
Cyrille Sauvage (FRA)
Stephane Ortelli (FRA) | Porsche GT3 Cup | GT | TRG |
| 67 | Marc Bullock (EUA)
Bohdan Kroczek (EUA)
Bill Keith (EUA)
Pat Flanagan (EUA) | Porsche GT3 Cup | GT | TRG |
| 68 | Jim Lowe (EUA)
Jim Pace (EUA) | Porsche GT3 Cup | GT | TRG |
| 69 | Jake Vargo (EUA)
Josh Vargo (EUA)
Mark Herrington (EUA)
Brady Refenning (EUA) | Porsche GT3 Cup | GT | TRG |
| 70 | Sylvain Tremblay (EUA)
David Haskell (EUA)
Jeff Altenburg (EUA)
Nick Ham (EUA) | Mazda RX-8 | GT | SpeedSource |
| 71 | Dave Lacey (CAN)
Brent Martini (EUA)
Greg Wilkins (CAN)
Mark Wilkins (CAN) | Porsche GT3 Cup | GT | SAMAX/ Doncaster Racing |
| 72 | Wolf Henzler (ALE)
Robin Liddell (ING)
Johannes van Overbeek (EUA)
Graham Rahal (EUA) | Porsche GT3 Cup | GT | Tafel Racing |
| 74 | Eric Lux (EUA)
Charles Espenlaub (EUA)
Andrew Davis (EUA)
Jim Tafel (EUA)
Mike Cawley (EUA) | Porsche GT3 Cup | GT | Tafel Racing |
| 75 | Tracy Krohn (EUA)
Nic Jonsson (SUE)
Jorg Bergmeister (ALE)
Colin Braun (EUA) | Pontiac Riley | DP | Krohn Racing |
| 77 | Harrison Brix (EUA)
Forest Barber (EUA)
Michel Jourdain Jr (MEX)
Terry Borcheller (EUA) | Ford Doran | DP | Feeds The Need/ Doran Racing |
| 78 | Sebastien Bourdais (FRA)
Raul Boesel (BRA)
BJ Zacharias (EUA) | Ford Doran | DP | Doran Racing |
| 80 | David Murry (EUA)
Leh Keen (EUA)
Craig Stanton (EUA) | Porsche GT3 Cup | GT | Synergy Racing |
| 81 | Danny Marshall (EUA)
Steve Marshall (EUA)
Hal Prewitt (EUA)
John Pew (EUA) | Porsche GT3 Cup | GT | Synergy Racing |
| 82 | Dirk Werner (ALE)
Philip Peter (AUS)
Dieter Quester (AUS)
Luca Riccitelli (AUS) | Porsche GT3 Cup | GT | Farnbacher Racing/ Farnbacher Loles |
| 83 | Dominik Farnbacher (ALE)
Mike Fitzgerald (EUA)
Pierre Ehret (EUA)
Marc Basseng (ALE) | Porsche GT3 Cup | GT | Farnbacher Loles/ Orbit Racing |
| 84 | George Robinson (EUA)
Wally Dallenbach (EUA)
Paul Dallenbach (EUA)
Darin Brassfield (EUA) | Pontiac Riley | DP | Robinson Racing |
| 86 | Don Kitch Jr (EUA)
Chris Pennington (EUA)
Don Gagne (EUA)
Chris Pallis (EUA) | Porsche GT3 Cup | GT | Synergy Racing |
| 87 | David Gaylord (EUA)
Wes Hill (EUA)
Ken Hill (EUA)
Will Diefenbach (EUA) | Porsche GT3 Cup | GT | Synergy Racing |
| 89 | Alex Figge (EUA)
Ryan Dalziel (EUA)
Jon Fogarty (EUA)
David Empringham (CAN) | Pontiac Riley | DP | Pacific Coast Motorsports |
| 92 | Dave Stewart (EUA)
Rob Stewart III (EUA)
Bob Gilbert (EUA)
Gary Stewart (EUA)
Tony Ave (EUA) | Porsche GT3 Cup | GT | TPC Racing |
| 93 | Gary Stewart (EUA)
Rob Stewart III (EUA)
Dave Stewart (EUA)
Bob Gilbert (EUA)
Tony Ave (EUA) | Porsche GT3 Cup | GT | TPC Racing |
| 97 | Skip Cummins (EUA)
Tony Ave (EUA) | Pontiac Riley | DP | CyberSpeed Racing |
| 99 | Bob Stallings (EUA)
Alex Gurney (EUA)
Jimmy Vasser (EUA)
Rocky Moran Jr (EUA) | Pontiac Riley | DP | Gainsco/ Blackhawk Racing |
