| | No. | Class | Team | Drivers | Car | Time |
| 1 | 1 | LMP1 | Audi Sport North America | Allan McNish Tom Kristensen Rinaldo Capello | Audi R10 | 1.45.026 |
| 2 | 2 | LMP1 | Audi Sport North America | Marco Werner Frank Biela Emanuele Pirro | Audi R10 | 1.45.038 |
| 3 | 7 | LMP2 | Penske Motorsports | Timo Bernhard Romain Dumas Helio Castroneves | Porsche RS Spyder | 1.46.630 |
| 4 | 6 | LMP2 | Penske Motorsports | Sascha Maassen Ryan Briscoe Emmanuel Collard | Porsche RS Spyder | 1.46.665 |
| 5 | 16 | LMP2 | Dyson Racing Team | Andy Wallace Butch Leitzinger Andy Lally | Porsche RS Spyder | 1.47.240 |
| 6 | 26 | LMP2 | Andretti Green Racing Inc. | Bryan Herta Dario Franchitti Tony Kanaan | Acura ARX-01a Acura | 1.47.709 |
| 7 | 20 | LMP2 | Dyson Racing Team | Chris Dyson Guy Smith | Porsche RS Spyder | 1.47.898 |
| 8 | 9 | LMP2 | Highcroft Racing | David Brabham Stefan Johansson Duncan Dayton | Acura ARX-01a Acura | 1.48.170 |
| 9 | 15 | LMP2 | Lowe's Fernandez Racing | Adrian Fernandez Luis Diaz David Martinez | Lola B06/43 Acura | 1.48.247 |
| 10 | 8 | LMP2 | B-K Motorsports | Jamie Bach Ben Devlin Rafael Matos | Lola B07/40 Mazda | 1.51.121 |
| 11 | 37 | LMP1 | Intersport Racing | Jon Field Clint Field Richard Berry | Creation CA06/H Judd | 1.51.435 |
| 12 | 12 | LMP1 | Autocon Motorsports | Michael Lewis Chris McMurry Bryan Willman | Lola B01/60 AER | 1.53.995 |
| 13 | 27 | LMP2 | Horag Racing | Fredy Lienhard Didier Theys Eric van de Poele | Lola B05/40 Judd | 1.54.502 |
| 14 | 3 | GT1 | Corvette Racing | Johnny O'Connell Jan Magnussen Ron Fellows | Corvette C6.R | 1.57.516 |
| 15 | 4 | GT1 | Corvette Racing | Oliver Gavin Olivier Beretta Max Papis | Corvette C6.R | 1.57.631 |
| 16 | 63 | GT1 | Team Modena | Antonio Garcia Liz Halliday Darren Turner | Aston Martin DBR9 | 1.59.048 |
| 17 | 62 | GT2 | Risi Competizione | Mika Salo Jaime Melo Johnny Mowlem | Ferrari 430 GTC | 2.02.017 |
| 18 | 31 | GT2 | Petersen / White Lightning | Tomas Enge Tim Bergmeister Memo Gidley | Ferrari 430 GTC | 2.02.182 |
| 19 | 45 | GT2 | Flying Lizard Motorsports | Johannes van Overbeek Jorg Bergmeister Marc Lieb | Porsche 997 GT3-RSR | 2.02.882 |
| 20 | 71 | GT2 | Tafel Racing | Wolf Henzler Robin Liddell Patrick Long | Porsche 997 GT3-RSR | 2.03.227 |
| 21 | 73 | GT2 | Tafel Racing | Jim Tafel Dominik Farnbacher Ian James | Porsche 997 GT3-RSR | 2.03.566 |
| 22 | 18 | GT2 | Rahal Letterman Racing | Ralf Kelleners Tom Milner Graham Rahal | Porsche 997 GT3-RSR | 2.03.575 |
| 23 | 21 | GT2 | Panoz Team PTG | Bill Auberlen Joey Hand Tom Kimber-Smith | Panoz Esperante GTLM | 2.03.902 |
| 24 | 61 | GT2 | Risi Competizione | Tracy Krohn Nic Jonsson Colin Braun | Ferrari 430 GTC | 2.04.024 |
| 25 | 44 | GT2 | Flying Lizard Motorsports | Lonnie Pechnik Seth Neiman Darren Law | Porsche 997 GT3-RSR | 2.04.993 |
| 26 | 22 | GT2 | Panoz Team PTG | Scott Maxwell Bryan Sellers Ross Smith | Panoz Esperante GTLM | 2.05.166 |
| 27 | 86 | GT2 | Spyker Squadron | Peter Kox Jarek Janis | Spyker C8 | 2.05.390 |
| 28 | 54 | GT2 | Team Trans Sport Racing | Tim Pappas Terry Borcheller Marc Basseng | Porsche 997 GT3-RSR | 2.06.385 |
| 29 | 85 | GT2 | Farnbacher Loles Motorsports | Pierre Ehret Lars-Erik Nielsen Dirk Werner | Porsche 997 GT3-RSR | 2.06.829 |
| 30 | 24 | GT2 | JMB Racing | Ben Aucott Joe Macari Rob Wilson | Ferrari 430 GTC | 2.08.009 |
| 31 | 10 | GT2 | Konrad Motorsport | Philip Collin Antonio Hermann Luciano da Moro | Porsche 911 GT3-RS | 2.12.429 |
| 32 | 53 | GT2 | Robertson Racing LLC | David Robertson Andrea Robertson Arie Luyendyk Jr. | Panoz Esperante GTLM | 2.14.108 |
| 33 | 32 | GT2 | Corsa / White Lightning | Maurizio Mediani Rui Aguas Jose Maria Lopez | Ferrari 430 GTC | no time |
| 34 | 77 | GT2 | Autoracing Club Bratislava | Miroslav Konopka Bo McCormick Mauro Casadei | Porsche 911 GT3-RS | no time |