* Passing Index (PI) is number of passes per 100 miles completed. Position Passing Index (PPI) is number of position passes per 100 miles completed. For historical passing analysis, visit the History tab.
The 2023 Chevrolet Detroit Grand Prix was 100 laps on the 1.645-mile Streets of Detroit temporary circuit.
The pit road speed was 40 mph and the race started the fourth time by the flag stand. Pole sitter Alex Palou gridded drivers' left.
The fuel window was 26–32 laps under green-flag conditions depending on the type of tires being used.
All cars but those of Will Power, Felix Rosenqvist, Pato O'Ward, Alexander Rossi, Rinus VeeKay, David Malukas and Graham Rahal started the race on alternate green-sidewalled guayule tires. Each car was required to use one set of new alternate and one set of primary black tires during the race.
At 3:20 p.m. EDT, 10 minutes prior to the scheduled green-flag time, the ambient temperature was 79 degrees with fair skies. The track temperature was 112 degrees according to Firestone Racing.
At 3:23 p.m., GM Vice President for Global Hardware Components and Subsystems Michelle Gardner gave the command, "Drivers, start your engines." All engines fired and all cars rolled off the grid.
On Lap 1, the clock started at the finish line but the green flag on the backstretch between Turns 2 and 3 was waved off due to improper spacing of the field.
On Lap 2, Palou led the field out of Turn 2 and took the green flag. As the field moved through Turn 3, the No. 77 Juncos Hollinger Racing Chevrolet of Callum Ilott made contact with the No. 27 Andretti Autosport Honda of Kyle Kirkwood, bringing out the race's second of seven cautions. Ilott stopped on course in Turn 3 while Kirkwood continued with rear wing damage. Kirkwood went on to take service in a closed pit and was issued a back-of-the-field penalty. Ilott's car was retired from the race.
The race restarted on Lap 7 and continued free of caution until Lap 43, when the No. 5 Arrow McLaren Chevrolet of Pato O'Ward made contact with the barrier in Turn 9. Leaders at the start of this caution were Palou, Power, Scott Dixon, Rosenqvist and Rossi.
Palou led the field on the Lap 49 restart but green-flag running was short lived with the race's fourth full-course caution starting on Lap 50 for the No. 51 Dale Coyne Racing with Rick Ware Racing Honda of Sting Ray Robb, which was stopped off course in Turn 3.
During the Lap 50 caution, the No. 15 Rahal Letterman Racing Honda of Graham Rahal made contact with the barrier in Turn 1. The No. 55 AJ Foyt Racing Chevrolet of Benjamin Pedersen subsequently made contact with Rahal's car in Turn 1. Pedersen was able to continue after assistance from the AMR INDYCAR Safety Team.
Palou led the field on the Lap 56 restart. Power passed Palou for the lead in Turn 3. On Lap 63, Palou returned the favor when he passed Power in Turn 3.
The race's fifth caution began on Lap 81 when the No. 28 Andretti Autosport Honda of Romain Grosjean made contact with the wall in Turn 4. Leaders at the start of this caution were Palou, Power, Dixon, Rosenqvist and Rossi.
Palou led the field on the Lap 87 restart, but the race reverted back to a yellow condition almost immediately for the No. 18 Dale Coyne Racing with HMD Honda of David Malukas which was stopped in Turn 9 after contact.
Palou again led the field on the Lap 91 restart. Power made a bid for the lead in Turn 3 but Dixon made contact with Power, allowing Rossi to get through and into the second position.
The race's seventh and final caution began on Lap 92 with Robb's car off course in Turn 3 after contact with the No. 14 AJ Foyt Racing Chevrolet of Santino Ferrucci. Leaders at the start of this caution were Palou, Rossi, Power, Rosenqvist and Dixon.
Palou once again led the field on the Lap 96 restart and took the white flag with a 1.1800-second lead over Power.
Palou went on to win the Chevrolet Detroit Grand Prix with a 1.1843-second margin of victory. It was his second victory of 2023 and the sixth of his NTT IndyCar Series career.
Warm-up for the 2023 Chevrolet Detroit Grand Prix was 30 minutes in duration and began on time at 10 a.m. EDT.
Conditions at the start of the session were 67 degrees ambient with fair skies. The track temperature was 86.2 degrees according to Firestone engineers.
The session ran without incident until the final minute, when the No. 21 Ed Carpenter Racing Chevrolet of Rinus VeeKay ended up in the Turn 8 run-off area. Time ran out during the red flag bringing out the checkered flag.
The No. 60 Meyer Shank Racing Honda of Simon Pagenaud ended warm-up with the fastest lap, a 1:02.3615.
Like the first practice on the Streets of Detroit, Practice 2 was riddled with red flags, including four stoppages due to cars in the Turn 8 run-off area.
The session started on time at 9:05 a.m. EDT and was 45 minutes in duration within a one-hour window.
In addition to the Turn 8 incidents — which involved Josef Newgarden, Rinus VeeKay, Alex Palou and Colton Herta — there was also contact in Turn 7.
At 9:46 a.m., the No. 29 Andretti Autosport Honda of Devlin DeFrancesco made contact with the Turn 7 barrier. DeFrancesco was able to climb out of his race car without assistance from the AMR INDYCAR Safety Team. Prior to the end of the session, he was seen and released from the IU Health INDYCAR Medical Unit.
At the conclusion of Practice 2, the No. 9 Chip Ganassi Racing Honda of Scott Dixon was fastest with a 1:03.2317.
Practice 1 for the Chevrolet Detroit Grand Prix was the first official session on the new-for-2023 1.7-mile temporary street circuit in Downtown Detroit.
The session began 10 minutes after its scheduled 3 p.m. EDT start time due to cleanup from the previous on-track activity. It ran for its full 90-minute duration. The ambient temperature was 87 degrees and the track temperature was 121.8 degrees.
The session was slowed by six red flags totaling 11 minutes and 12 seconds, all involving Turns 1, 3 and 8.
Augustin Canapino, Marcus Ericsson and Scott McLaughlin had issues in Turn 1.
Graham Rahal and Alex Palou found the run-off area in Turn 3.
Pato O'Ward ended the session in Turn 8 with less than two minutes to go.
At the conclusion of Practice 1, the No. 5 Arrow McLaren Chevrolet of O'Ward topped the timesheet with a 1:03.0773.
150 seconds of total time with a maximum time of 15 seconds per activation.
Tires Available per Entry
Seven sets primary, four sets alternate (weekend). Teams must use one set of primary and one new set of alternate tires in each race. One additional set available to teams fielding a rookie driver is available for the first session of the weekend.