12 Hours of Sebring Hour 3: Cadillacs 1-2-3-4-5-6
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| #85 JDC Cadillac gives chase in 2nd position |
At the 1/4-mark of the 2019 12 Hours of Sebring Cadillacs run 1-2-3-4-5-6 with the #55 Mazda still on the lead lap as their only competition.
The #31 Cadillac, with Felipe Nasr now at the wheel, continues to lead the #85 Cadillac of Tristan Vautier by some 7 seconds.
Brendon Hartley runs 3rd in the #5 Cadillac.
Richard Westbrook has the #67 Ganassi Ford GT in front in the GTLM class ahead of the #24 BMW. while the #9 Porsche of Lars Kern leads in GTD.
Hour 3 Standings
| POS | Class | PIC | CURRENT DRIVER | No./MFG | LAPS | BEHIND | STOPS |
| 1 | DPI | 1 | Felipe Nasr | #31 CADILLAC DPI | 71 | 0.000s | 3 |
| 2 | DPI | 2 | Tristan Vautier | #85 CADILLAC DPI | 71 | 7.424 | 3 |
| 3 | DPI | 3 | Brendon Hartley | #5 CADILLAC DPI | 71 | 18.914 | 3 |
| 4 | DPI | 4 | Simon Trummer | #84 CADILLAC DPI | 71 | 24.251 | 3 |
| 5 | DPI | 5 | Matthieu Vaxiviere | #10 CADILLAC DPI | 71 | 40.793 | 7 |
| 6 | DPI | 6 | Rene Binder | #50 CADILLAC DPI | 71 | 1:13.272 | 3 |
| 7 | DPI | 7 | Harry Tincknell | #55 MAZDA DPI | 71 | 1:17.370 | 3 |
| 8 | DPI | 8 | Romain Dumas | #54 NISSAN DPI | 70 | 1 LAP | 3 |
| 9 | DPI | 9 | Ricky Taylor | #7 ACURA DPI | 70 | 1 LAP | 4 |
| 10 | DPI | 10 | Juan Pablo Montoya | #6 ACURA DPI | 70 | 1 LAP | 6 |
| 11 | GTLM | 1 | Richard Westbrook | #67 FORD GT | 68 | 3 LAPS | 2 |
| 12 | GTLM | 2 | Philipp Eng | #24 BMW M8 GTE | 68 | 3 LAPS | 2 |
| 13 | GTLM | 3 | Sebastien Bourdais | #66 FORD GT | 68 | 3 LAPS | 2 |
| 14 | GTLM | 4 | Colton Herta | #25 BMW M8 GTE | 68 | 3 LAPS | 2 |
| 15 | GTLM | 5 | Jan Magnussen | #3 CHEVROLET CORVETTE C7.R | 68 | 3 LAPS | 3 |
| 16 | LMP2 | 1 | Cameron Cassels | #38 ORECA LMP2 | 68 | 3 LAPS | 3 |
| 17 | GTLM | 6 | Tommy Milner | #4 CHEVROLET CORVETTE C7.R | 67 | 4 LAPS | 4 |
| 18 | GTLM | 7 | Nick Tandy | #911 PORSCHE 911 RSR | 67 | 4 LAPS | 4 |
| 19 | GTLM | 8 | Earl Bamber | #912 PORSCHE 911 RSR | 67 | 4 LAPS | 4 |
| 20 | GTD | 1 | Lars Kern | #9 PORSCHE 911 GT3 R | 67 | 4 LAPS | 2 |
| 21 | GTD | 2 | Jeroen Bleekemolen | #33 MERCEDES-AMG GT3 | 67 | 4 LAPS | 3 |
| 22 | GTD | 3 | Dillon Machavern | #96 BMW M6 GT3 | 67 | 4 LAPS | 2 |
| 23 | GTD | 4 | Ana Beatriz | #57 ACURA NSX GT3 | 67 | 4 LAPS | 3 |
| 24 | GTD | 5 | Mirko Bortolotti | #11 LAMBORGHINI HURACAN GT3 | 67 | 4 LAPS | 3 |
| 25 | GTD | 6 | Jeff Westphal | #63 FERRARI 488 GT3 | 67 | 4 LAPS | 3 |
| 26 | GTD | 7 | Maximilian Buhk | #71 MERCEDES-AMG GT3 | 67 | 4 LAPS | 5 |
| 27 | GTD | 8 | Justin Marks | #86 ACURA NSX GT3 | 67 | 4 LAPS | 2 |
| 28 | GTD | 9 | Patrick Lindsey | #73 PORSCHE 911 GT3 R | 67 | 4 LAPS | 4 |
| 29 | GTD | 10 | Spencer Pumpelly | #44 LAMBORGHINI HURACAN GT3 | 67 | 4 LAPS | 4 |
| 30 | GTD | 11 | Aaron Telitz | #12 LEXUS RC F GT3 | 66 | 5 LAPS | 3 |
| 31 | GTD | 12 | Jack Hawksworth | #14 LEXUS RC F GT3 | 66 | 5 LAPS | 3 |
| 32 | GTD | 13 | Ricky Feller | #29 AUDI R8 LMS GT3 | 66 | 5 LAPS | 3 |
| 33 | GTD | 14 | Alex Riberas | #19 AUDI R8 LMS GT3 | 66 | 5 LAPS | 5 |
| 34 | GTD | 15 | Parker Chase | #8 AUDI R8 LMS GT3 | 66 | 5 LAPS | 4 |
| 35 | GTD | 16 | Brandon Gdovic | #47 LAMBORGHINI HURACAN GT3 | 65 | 6 LAPS | 6 |
| 36 | GTD | 17 | Ryan Hardwick | #48 LAMBORGHINI HURACAN GT3 | 65 | 6 LAPS | 7 |
| 37 | LMP2 | 2 | Anders Fjorback | #52 ORECA LMP2 | 62 | 9 LAPS | 4 |
| 38 | DPI | 11 | Timo Bernhard | #77 MAZDA DPI | 54 | 17 LAPS | 2 |