Lap 556 - 18:10:43 (6:21 AM) - The No. 80 Porsche and No. 81 Porsche both head to their garages.

Lap 557 - 18:14:21 (6:24 AM) - The overall-leading No. 23 Porsche has a vibration at the left front of the car, and the team suspects a tire issue. The machine is slow in Turn 1.

Lap 558 - 18:19:13 (6:29 AM) - OVERALL LEAD CHANGE: With the No. 23 Porsche making an extended pit stop to change a half shaft, the No. 02 Lexus takes the overall lead. The No. 67 Porsche pits and Bullock gets in. The No. 59 Porsche pits and France gets in.

Lap 560 - 18:24:10 (6:34 AM) - The No. 3 BMW is stopped on the back straightaway with an apparent loss of power. The No. 81 Porsche re-enters the race.

Lap 561 - 18:26:04 (6:36 AM) - The No. 75 Pontiac pits and Krohn gets in.

Lap 562 - 18:28:05 (6:38 AM) - The No. 60 Lexus pits and Negri gets in.

Lap 563 - 18:32:28 (6:42 AM) - The No. 58 Porsche has made its way to second place overall. The No. 99 Pontiac is served with a "stop and go" penalty for shortcutting the chicane. The No. 7 Pontiac pits and McGarrity gets in.

Lap 570 - 18:41:41 (6:52 AM) - The No. 09 Pontiac pits and Labonte gets in.

Lap 572 - 18:45:37 (6:56 AM) - The No. 3 BMW re-enters the field with LaJoie driving. The No. 59 Porsche is leaking fluid.

Lap 575 - 18:51:06 (7:02 AM) - With the No. 39 Lexus on pit road, the No. 60 Lexus is now in second place.

Lap 577 - 18:53:34 (7:04 AM) - The No. 22 Porsche and No. 3 BMW leave the track and head to their garages.

Lap 578 - 18:56:07 (7:06 AM) - The No. 40 Pontiac is served with a 10-second penalty as the fueler was not wearing eye protection. The No. 19 Ford pits and Gidley gets in.

Lap 579 - 18:58:18 (7:08 AM) - The No. 74 Porsche pits and Cawley gets in.

Lap 579 - 18:59:00 (7:09 AM) - The race-leading No. 02 Lexus makes a routine pit stop and Mears remains in the car. The No. 16 Pontiac pits and Rob Dyson gets in.

Lap 580 - 19:00:23 (7:10 AM) - The No. 43 Porsche has pulled off-course in Turn 5.

Lap 581 - 19:03:36 (7:14 AM) - The No. 72 Porsche pits and Rahal gets in.

Lap 583 - 19:05:59 (7:16 AM) - The GT-leading No. 36 Porsche makes a routine pit stop. The No. 41 Porsche pits and Will Nonnamaker gets in.

Lap 586 - 19:13:07 (7:23 AM) - The No. 58 Porsche pits and Maassen gets in, giving the No. 60 Lexus the second overall spot.

Lap 588 - 19:15:32 (7:26 AM) - The No. 22 Porsche returns to the track after a lengthy stay in its garage.

Lap 588 - 19:16:15 (7:26 AM) - The No. 39 Lexus passed the No. 58 Porsche for third place overall.

Lap 589 - 19:17:52 (7:28 AM) - The No. 23 Porsche pits for a routine stop.