| # | PILOTE | PAYS | ÉQUIPE | CHASSIS | MOTEUR | PNEUS |
| 1 | Sébastien Bourdais | Newman/Haas/Lanigan Racing | DP01 | Cosworth | Bridgestone | |
| 4 | Dan Clarke | Minardi Team USA | DP01 | Cosworth | Bridgestone | |
| 28 | Ryan Dalziel | Pacific Coast Motorsports | DP01 | Cosworth | Bridgestone | |
| 7 | Mario Dominguez | Forsythe Racing | DP01 | Cosworth | Bridgestone | |
| 14 | Robert Doornbos | Minardi Team USA | DP01 | Cosworth | Bridgestone | |
| 29 | Alex Figge | Pacific Coast Motorsports | DP01 | Cosworth | Bridgestone | |
| 22 | Tristan Gommendy | PKV Racing | DP01 | Cosworth | Bridgestone | |
| 42 | Matt Halliday | Conquest Racing | DP01 | Cosworth | Bridgestone | |
| 21 | Neel Jani | PKV Racing | DP01 | Cosworth | Bridgestone | |
| 19 | Bruno Junqueira | Dale Coyne Racing | DP01 | Cosworth | Bridgestone | |
| 11 | Katherine Legge | Dale Coyne Racing | DP01 | Cosworth | Bridgestone | |
| 29 | Roberto Moreno | Pacific Coast Motorsports | DP01 | Cosworth | Bridgestone | |
| 15 | Simon Pagenaud | Team Australia | DP01 | Cosworth | Bridgestone | |
| 5 | Will Power | Team Australia | DP01 | Cosworth | Bridgestone | |
| 2 | Graham Rahal | Newman/Haas/Lanigan Racing | DP01 | Cosworth | Bridgestone | |
| 3 | Oriol Servia | Forsythe Racing | DP01 | Cosworth | Bridgestone | |
| 8 | Alexandre Tagliani | RSPORTS | DP01 | Cosworth | Bridgestone | |
| 3 | Paul Tracy | Forsythe Racing | DP01 | Cosworth | Bridgestone | |
| 9 | Justin Wilson | RSPORTS | DP01 | Cosworth | Bridgestone |