| | No. | Class | Team | Drivers | Car | 10.20- 11.15 | 14.15- 15.10 |
| 1 | 2 | LMP1 | Audi Sport North America | Marco Werner Frank Biela Emanuele Pirro | Audi R10 | 1.46.759 | 1.46.270 |
| 2 | 7 | LMP2 | Penske Motorsports | Timo Bernhard Romain Dumas Helio Castroneves | Porsche RS Spyder | 1.47.107 | 1.46.827 |
| 3 | 6 | LMP2 | Penske Motorsports | Sascha Maassen Ryan Briscoe Emmanuel Collard | Porsche RS Spyder | 1.51.859 | 1.46.851 |
| 4 | 1 | LMP1 | Audi Sport North America | Allan McNish Tom Kristensen Rinaldo Capello | Audi R10 | 1.46.950 | 1.47.110 |
| 5 | 16 | LMP2 | Dyson Racing Team | Andy Wallace Butch Leitzinger Andy Lally | Porsche RS Spyder | 1.47.707 | 1.47.421 |
| 6 | 26 | LMP2 | Andretti Green Racing Inc. | Bryan Herta Dario Franchitti Tony Kanaan | Courage Acura ARX-01a Acura | 1.48.364 | 1.47.896 |
| 7 | 20 | LMP2 | Dyson Racing Team | Chris Dyson Guy Smith | Porsche RS Spyder | 1.48.806 | 1.48.809 |
| 8 | 15 | LMP2 | Lowe's Fernandez Racing | Adrian Fernandez Luis Diaz David Martinez | Lola B06/43 Acura | 1.49.765 | 1.50.626 |
| 9 | 9 | LMP2 | Highcroft Racing | David Brabham Stefan Johansson Duncan Dayton | Courage Acura ARX-01a Acura | 1.49.949 | 1.49.901 |
| 10 | 37 | LMP1 | Intersport Racing | Jon Field Clint Field Richard Berry | Creation CA06/H Judd | 1.51.252 | 1.50.704 |
| 11 | 12 | LMP1 | Autocon Motorsports | Michael Lewis Chris McMurry Bryan Willman | Lola B01/60 AER | 1.52.597 | 1.54.933 |
| 12 | 8 | LMP2 | B-K Motorsports | Jamie Bach Ben Devlin Rafael Matos | Lola B07/40 Mazda | 2.02.222 | 1.53.024 |
| 13 | 27 | LMP2 | Horag Racing | Fredy Lienhard Didier Theys Eric van de Poele | Lola B05/40 Judd | 1.56.934 | 1.54.18 |
| 14 | 4 | GT1 | Corvette Racing | Oliver Gavin Olivier Beretta Max Papis | Corvette C6.R | no time | 1.57.361 |
| 15 | 3 | GT1 | Corvette Racing | Johnny O'Connell Jan Magnussen Ron Fellows | Corvette C6.R | no time | 1.57.421 |
| 16 | 63 | GT1 | Team Modena | Antonio Garcia Liz Halliday Darren Turner | Aston Martin DBR9 | 1.59.254 | 1.57.877 |
| 17 | 31 | GT2 | Petersen / White Lightning | Tomas Enge Tim Bergmeister Memo Gidley | Ferrari 430 GTC | 2.03.822 | 2.02.694 |
| 18 | 62 | GT2 | Risi Competizione | Mika Salo Jaime Melo Johnny Mowlem | Ferrari 430 GTC | 2.03.296 | 2.02.947 |
| 19 | 61 | GT2 | Risi Competizione | Tracy Krohn Nic Jonsson Colin Braun | Ferrari 430 GTC | 2.03.567 | 2.07.792 |
| 20 | 71 | GT2 | Tafel Racing | Wolf Henzler Robin Liddell Patrick Long | Porsche 997 GT3-RSR | 2.03.717 | 2.03.956 |
| 21 | 32 | GT2 | Corsa / White Lightning | Maurizio Mediani Rui Aguas Jose Maria Lopez | Ferrari 430 GTC | 2.03.904 | no time |
| 22 | 73 | GT2 | Tafel Racing | Jim Tafel Dominik Farnbacher Ian James | Porsche 997 GT3-RSR | 2.05.862 | 2.03.931 |
| 23 | 45 | GT2 | Flying Lizard Motorsports | Johannes van Overbeek Jorg Bergmeister Marc Lieb | Porsche 997 GT3-RSR | 2.04.056 | 2.03.958 |
| 24 | 18 | GT2 | Rahal Letterman Racing | Ralf Kelleners Tom Milner Graham Rahal | Porsche 997 GT3-RSR | 2.04.937 | 2.04.103 |
| 25 | 86 | GT2 | Spyker Squadron | Peter Kox Jarek Janis | Spyker C8 | 2.04.155 | 2.05.216 |
| 26 | 22 | GT2 | Panoz Team PTG | Scott Maxwell Bryan Sellers Ross Smith | Panoz Esperante GTLM | 2.05.512 | 2.05.236 |
| 27 | 21 | GT2 | Panoz Team PTG | Bill Auberlen Joey Hand Tom Kimber-Smith | Panoz Esperante GTLM | 2.05.648 | 2.05.567 |
| 28 | 44 | GT2 | Flying Lizard Motorsports | Lonnie Pechnik Seth Neiman Darren Law | Porsche 997 GT3-RSR | 2.06.370 | 2.05.680 |
| 29 | 85 | GT2 | Farnbacher Loles Motorsports | Pierre Ehret Lars-Erik Nielsen Dirk Werner | Porsche 997 GT3-RSR | 2.07.606 | 2.06.420 |
| 30 | 54 | GT2 | Team Trans Sport Racing | Tim Pappas Terry Borcheller Marc Basseng | Porsche 997 GT3-RSR | 2.06.680 | 2.08.458 |
| 31 | 24 | GT2 | JMB Racing | Ben Aucott Joe Macari Rob Wilson | Ferrari 430 GTC | 2.07.833 | 2.09.212 |
| 32 | 53 | GT2 | Robertson Racing LLC | David Robertson Andrea Robertson Arie Luyendyk Jr. | Panoz Esperante GTLM | 2.14.930 | 2.10.956 |
| 33 | 10 | GT2 | Konrad Motorsport | Philip Collin TBA | Porsche 911 GT3-RS | 2.12.661 | 2.12.183 |
| 34 | 77 | GT2 | Autoracing Club Bratislava | Miroslav Konopka Bo McCormick Mauro Casadei | Porsche 911 GT3-RS | no time | no time |