The complete schedule, with television networks and times (all ET):
March 13 Streets of St. Petersburg ABC 12:30 p.m.
April 2 Phoenix International Raceway NBCSN 8 p.m.
April 17 Streets of Long Beach NBCSN 4 p.m.
April 24 Barber Motorsports Park NBCSN 3 p.m.
May 14 Grand Prix of Indianapolis ABC 3:30 p.m.
May 29 Indianapolis 500 ABC 11 a.m.
June 4 Raceway at Belle Isle Park ABC 3:30 p.m.
June 5 Raceway at Belle Isle Park ABC 3:30 p.m.
June 11 Texas Motor Speedway NBCSN 8 p.m.
June 26 Road America NBCSN 12:30 p.m.
July 10 Iowa Speedway NBCSN 5 p.m.
July 17 Streets of Toronto NBCSN 3 p.m.
July 31 Mid-Ohio Sports Car Course NBCSN 2 p.m.
Aug. 21 Pocono Raceway NBCSN 3 p.m.
Sept. 4 Streets of Boston NBCSN 2 p.m.
Sept. 18 Sonoma Raceway NBCSN 7 p.m.