| 10 | Wayne Taylor / Max Angelelli / Jeff Gordon / Jan Magnussen | Riley Mk XI Pontiac | SunTrust Racing | 1:43.4830 |
| 99 | Alex Gurney / Jon Fogarty / Bob Stallings / Jim Vasser | Riley Mk XI Pontiac | Gainsco/Bob Stallings Racing | 1:43.7300 |
| 02 | Scott Dixon / Dan Wheldon | Riley Mk XI Lexus | Target Chip Ganassi with Felix Sabates | 1:43.9970 |
| 59 | J. C. France / Hurley Haywood / João Barbosa / Roberto Moreno | Riley Mk XI Porsche | Brumos Porsche/Kendall | 1:44.1900 |
| 01 | Scott Pruett | Riley Mk XI Lexus | TELMEX Chip Ganassi with Felix Sabates | 1:44.2590 |
| 91 | Jim Matthews / Marc Goossens / Jimmie Johnson / Ryan Hunter-Reay | Riley Mk XI Pontiac | Lowe's Riley-Matthews Motorsports | 1:44.2860 |
| 7 | Tom Kimber-Smith / Tomáš Enge / Jeff Bucknum | Riley Mk XI Pontiac | SAMAX | 1:44.3720 |
| 76 | Colin Braun / Max Papis / J.J. Lehto | Riley Mk XI Pontiac | Krohn Racing | 1:44.4130 |
| 58 | David Donohue / Darren Law / Buddy Rice / Scott Sharp | Riley Mk XI Porsche | Red Bull/Brumos Porsche | 1:44.4640 |
| 19 | Rob Finlay / Michael Valiante / Michael McDowell / Bobby Labonte | Crawford DP03 Ford | Finlay Motorsports | 1:44.5160 |
| 23 | Jörg Bergmeister / Romain Dumas / Patrick Long | Crawford DP03 Porsche | Alex Job Racing | 1:44.6050 |
| 84 | George Robinson / Wally Dallenbach, Jr. / Paul Dallenbach / Katherine Legge | Riley Mk XI Pontiac | Robinson Racing | 1:44.6600 |
| 75 | Tracy Krohn / Niclas Jönsson | Riley Mk XI Pontiac | Krohn Racing | 1:44.6760 |
| 39 | Christian Fittipaldi / Eddie Cheever, Jr. / Emmanuel Collard / Sascha Maassen | Crawford DP03 Porsche | Cheever Racing | 1:44.6890 |
| 60 | Mark Patterson / Oswaldo Negri / Helio Castroneves / Sam Hornish, Jr. | Riley Mk XI Lexus | Michael Shank Racing | 1:44.8410 |
| 16 | Chris Dyson / Rob Dyson / Guy Smith / Oliver Gavin | Crawford DP03 Pontiac | Howard Motorsports | 1:44.8630 |
| 11 | Milka Duno / Darren Manning / Patrick Carpentier / Ryan Dalziel | Riley Mk XI Pontiac | SAMAX | 1:45.0210 |
| 05 | Bill Auberlen / Matthew Alhadeff / Gene Sigal / Karl Wendlinger | Riley Mk XI BMW | Sigalsport BMW | 1:45.1800 |
| 6 | Henry Zogaib / Ian James / Paul Tracy / A. J. Allmendinger | Riley Mk XI Lexus | Michael Shank Racing | 1:45.2800 |
| 47 | Charles Morgan / Rob Morgan / Timo Bernhard / B. J. Zacharias | Riley Mk XI Porsche | TruSpeed Motorsports | 1:45.4950 |
| 00 | Ed Carpenter / Tomas Scheckter / Tony George / Anthony Foyt | Crawford DP03 Porsche | Vision Racing | 1:45.5250 |
| 77 | Fabrizio Gollin / Memo Gidley / Michel Jourdain / Oriol Servia | Doran JE4 Ford | Doran Racing | 1:45.5960 |
| 20 | Andy Wallace / Butch Leitzinger / Tony Stewart | Crawford DP03 Pontiac | Howard Motorsports | 1:45.6060 |
| 61 | Mark Wilkins / David Empringham / Brian Frisselle / Burt Frisselle | Riley Mk XI Lexus | AIM Autosport | 1:46.3580 |
| 51 | Mike Newton / Thomas Erdos / Harrison Brix | Fabcar FDSC/03 Porsche | Cheever Racing | 1:46.4850 |
| 3 | Shane Lewis / Randy Ruhlman | Riley Mk XI Lexus | Southard Motorsports | 1:46.7030 |
| 12 | Roger Schramm / Jack Baldwin / Bill Lester | Riley Mk XI Pontiac | RVO Motorsports | 1:47.3350 |
| 18 | Uwe Alzen / Robert Renauer / Terry Borcheller / Gastón Mazzacane / Nicky Pastorelli | Fabcar FDSC/03 Porsche | VICI Racing | 1:47.5110 |
| 28 | Bruce McQuiston / Joel Feinberg / Joseph Safina | Porsche 997 GT3 Cup | At Speed Motorsports | 1:51.9460 |
| 85 | Leh Keen / Pierre Ehret / Dirk Werner / Jörg Hardt | Porsche 997 GT3 Cup | Farnbacher Loles Motorsports | 1:52.0160 |
| 66 | Andy Lally / Spencer Pumpelly / Richard Valentine / Mark Greenberg / Kevin Buckler | Porsche 997 GT3 Cup | TRG | 1:52.7910 |
| 86 | Larry Bowman / Don Bell / Lance Willsley / Shawn Price | Porsche 997 GT3 Cup | Farnbacher Loles Motorsports | 1:52.8150 |
| 81 | Steve Johnson / Richard Westbrook / Richard Lietz / Patrick Huisman | Porsche 997 GT3 Cup | Synergy Racing | 1:52.9910 |
| 72 | Andrew Davis / Nathan Swartzbaugh / Robin Liddell / Jim Tafel | Porsche 997 GT3 Cup | Tafel Racing | 1:53.1090 |
| 74 | Eric Lux / Wolf Henzler / Dominik Farnbacher / Jim Tafel | Porsche 997 GT3 Cup | Tafel Racing | 1:53.1680 |
| 15 | Tom Nastasi / Alex Tagliani / Guy Cosmo / Lou Gigliotti | Ford Mustang Cobra GT | Blackforest Motorsports | 1:53.2860 |
| 70 | David Haskell / Sylvain Tremblay / Nick Ham / Randy Pobst | Mazda RX-8 | SpeedSource | 1:53.4080 |
| 88 | Dino Loles / Bryce Miller / Tom Pank / Hugh Plumb / Craig Stanton | Porsche 997 GT3 Cup | Farnbacher Loles Motorsports | 1:53.4090 |
| 87 | Christian Zugel / John Burke / Gunnar Jeannette / Ryan Eversley | Porsche 997 GT3 Cup | Farnbacher Loles Motorsports | 1:53.5670 |
| 65 | Michael Gomez / Murray Marden / Brent Milner / John Peterson | Porsche 997 GT3 Cup | TRG | 1:53.6880 |
| 64 | Jim Lowe / Jim Pace / Johannes Van Overbeek / Ralf Kelleners | Porsche 997 GT3 Cup | TRG | 1:53.9350 |
| 07 | Paul Edwards / Andy Pilgrim / Johnny O'Connell / Kelly Collins | Pontiac GXP.R | Banner Racing | 1:54.0450 |
| 06 | Leighton Reese / Andy Pilgrim / Paul Edwards / Kelly Collins | Pontiac GXP.R | Banner Racing | 1:54.2140 |
| 69 | Emil Assentato / Nick Longhi / Jeff Segal | Mazda RX-8 | SpeedSource | 1:54.2390 |
| 63 | Dennis Spencer / Scott Spencer / Rich Grupp | Mazda RX-8 | Team Spencer Motorsports | 1:54.3670 |
| 89 | Barry Ellis / Michael Grande / Frank Rossi / Fraser Wellon / Cory Friedman | Porsche 997 GT3 Cup | Autometrics Motorsports | 1:54.8930 |
| 73 | Lars Nielsen / Brent Martini / Dieter Quester / Philipp Peter | Porsche 997 GT3 Cup | Tafel Racing | 1:54.9260 |
| 68 | Ted Ballou / Brad Jaeger / Chris Gleason / Rocco DeSimone II | Porsche 997 GT3 Cup | TRG | 1:55.2020 |
| 67 | Piere Bourque / Tom Cloet / Mike Solley / Auston Harris | Porsche 997 GT3 Cup | TRG | 1:55.6350 |
| 57 | Dominic Cicero / Marc Bunting / James Gue / John Stevenson | Chevrolet Corvette | Stevenson Motorsports | 1:55.7750 |
| 21 | Diego Alessi / Matt Connolly / Romeo Kapudija | BMW M3 | Matt Connolly Motorsports | 1:55.9550 |
| 17 | David Lacey / Greg Wilkins / Lance Arnold / Johnny Mowlem / Tom Papadopoulos | Porsche 997 GT3 Cup | Doncaster Racing | 1:56.1990 |
| 22 | Carlos de Quesada / Jean-Francois Dumoulin / Scooter Gabel | Porsche 997 GT3 Cup | Alegra Motorsports/Fiorano Racing | 1:56.3850 |
| 43 | Joe Sahlen / Will Nonnamaker / Wayne Nonnamaker / Joe Nonnamaker | Chevrolet Corvette | Team Sahlen | 1:56.8660 |
| 14 | Bransen Patch / Mac McGehee / Wes Allen / Jim Hamblin / Cory Friedman | Porsche 997 GT3 Cup | Autometrics Motorsports | 1:57.1820 |
| 83 | Dave Gaylord / Don Pickering / Hal Hilton / Ben McCrackin | Porsche 997 GT3 Cup | Synergy Racing | 1:58.3320 |
| 24 | Robert Dennard / Mike Pickett / Bill Cotter | BMW M3 | Matt Connolly Motorsports | 1:59.3530 |
| 08 | Steve Goldin / Keith Goldin / John Finger | Mazda RX-8 | Goldin Brothers Racing | 1:59.6290 |
| 42 | John Mayes / David Kaemmer / Michael Auriemma / Chris Willcox | Porsche 996 GT3 Cup | Team Sahlen | 1:59.6740 |
| 82 | Don Kitch / Chris Pennington / Chris Pallis / Tony Bawcutt | Porsche 997 GT3 Cup | Synergy Racing | 1:59.7690 |
| 49 | Joe Sahlen / Will Nonnamaker / Wayne Nonnamaker / Joe Nonnamaker | Pontiac GTO | Team Sahlen | 1:59.8850 |
| 48 | Hans Hauser / Robert Dubler / Ed Magner / Michael DeFontes | Chevrolet Corvette | WTF Engineering | 2:00.0920 |
| 46 | Michael Baughman / Bryan Collyer / John Connolly | Chevrolet Corvette | Michael Baughman Racing | 2:02.3240 |
| 41 | Robb Brent / Jim Michaelian / Bob Michaelian / Tom Malloy / Ernie Becker | Porsche 996 GT3 Cup | Team Sahlen | 2:04.7710 |