In 2015, Lazier returned with Lazier Partners Racing to drive the No. 91 Dallara-Chevrolet at the Indianapolis 500. Lazier used using Chevrolet's new aero kit on the car. Lazier first practiced on May 14, completing 28 laps prior to Pole Day. The car then suffered gearbox issues prior to qualifying and Lazier was unable to make an attempt to qualify in the original line, but was repaired in time for the Last Row Shootout. The speed of Lazier's first qualifying attempt was , compared to Bryan Clauson's next-slowest speed of . Lazier's pit crew made wing adjustments to reduce the car's downforce. Lazier improved to a speed of , but ultimately ran out of time and failed to qualify.