| 05 | Metcalf / Carelli / Liniger / Conway / Curran | Team Re/Max Racing | | Chevrolet | Corvette | | Chevrolet | GTS |
| 3 | Grala / Rehm / Negri / Clark | Cegwa Sport (USA) | | Fabcar | FDSC/03 | | Toyota | DP |
| 5 | Bentley / Kitch / Pruskowski / Pruskowski / Gorriaran | Team Seattle/Essex Racing (USA) | | Lola | B2K/40 | | Nissan | SRPII |
| 7 | Konrad / Yvon / Murphy / Unser | Konrad Motorsport (D) | | Saleen | S7-R | | Ford | GTS |
| 8 | Said / Law / Quester | G&W Motorsports (USA) | | Picchio | DP2 | | BMW | DP |
| 10 | Terrien / Saviozzi / Delalande | MAC Racing (I) | | Porsche | 996 GT3-R | | Porsche | GT |
| 15 | Gaylord / MacLeod / Gaughran | Team Seattle/Essex Racing | | Lola | B2K/40 | | Nissan | SRPII |
| 21 | Farfus / Earle / Atapattu / Pescatori | JMB Racing USA Team Ferrari (USA) | | Ferrari | 360 Modena | N-GT | Ferrari | GT |
| 24 | Policand / Barbosa / Neugarten | Perspective Racing (F) | | Mosler | MT900 | R | Chevrolet | GTS |
| 29 | Curran / Duncan | Sky Blue Racing | | Ford | Mustang | | Ford | GTS |
| 35 | Lazzaro / Mowlem / Kelleners / Baldi | Risi Competizione (USA) | | Ferrari | 360 Modena | GT | Ferrari | GT |
| 40 | Bell / Bell / Gregg | Derhaag Motorsports | | Chevrolet | Corvette C5 | | Chevrolet | GTS |
| 43 | Petty / Baron / Lieb / Hindery / Policastro / Policastro, Jr. | Orbit Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 44 | Petty / Lieb / Hindery / Policastro, Jr. / Policastro | Orbit Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 45 | Petty / Baron / Lieb / Hindery / Policastro / Policastro, Jr. | Orbit Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 48 | Riggins / Machavern / Lepage / Lagasse | Heritage Motorsports (USA) | | Ford | Mustang | | Ford | GTS |
| 49 | Busnelli / Benucci | MAC Racing (I) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 58 | Donohue / Borkowski / Bye / Jackson | Brumos Racing (USA) | | Fabcar | FDSC/03 | | Porsche | DP |
| 59 | France / Haywood / Goodyear | Brumos Racing (USA) | | Fabcar | FDSC/03 | | Porsche | DP |
| 61 | van Merksteijn / Brugman / Munsterhuis | System Force Motorsport (NL) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 66 | Buckler / Schrom / Bernhard / Bergmeister | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RS | | Porsche | GT |
| 67 | Nastasi / Julien / Lacey / Davis | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RS | | Porsche | GT |
| 68 | Michaelian / Valentine / Hessert / Hessert, III | The Racers Group (USA) | Kevin Buckler | Porsche | 996 GT3-RS | | Porsche | GT |
| 78 | Gunnar Jeannette | Gunnar Racing (USA) | | Porsche | 911 GT1 | | Porsche | GTS |
| 81 | Martini / Wagner | G&W Motorsports (USA) | | Porsche | 996 GT3-R | | Porsche | GT |
| 83 | Steranka / Van Overbeek / Murry | Rennwerks Motorsports (USA) | | Porsche | 996 GT3-R | | Porsche | GT |
| 88 | Maxwell / Brabham / Empringham | Multimatic Motorsports | | Multimatic | MDP1 | | Ford | DP |
| 97 | Peroni / Savoldi / Francioni | Lucchini Engineering (I) | | Lucchini | SR2002 | | Nissan | SRPII |
| 98 | Schumacher / Snow / Pobst | Schumacher Racing (USA) | | Porsche | 996 GT3-RS | | Porsche | GT |
| 99 | Greenberg / Nelson / Brensinger / Hamblin / Pobst | NETTTS Racing | | Porsche | 996 GT3-RS | | Porsche | GT |