1989 IndyCar season Drivers and constructors Drivers and constructors

| Team | Chassis | Engine | Tires | Drivers |
|---|---|---|---|---|
| Hemelgarn Racing | Lola | Judd / Buick | Goodyear | Gordon Johncock |
| Hemelgarn Racing | Lola | Judd / Buick | Goodyear | Scott Goodyear |
| Hemelgarn Racing | Lola | Judd / Buick | Goodyear | Robby Unser |
| Hemelgarn Racing | Lola | Judd / Buick | Goodyear | Billy Vukovich III |
| Granatelli Racing | Lola / March | Buick / Cosworth | Goodyear | Didier Theys |
| Granatelli Racing | Lola / March | Buick / Cosworth | Goodyear | John Andretti |
| Granatelli Racing | Lola / March | Buick / Cosworth | Goodyear | Tom Sneva |
| Dale Coyne Racing | Lola | Cosworth | Goodyear | Guido Daccò |
| Dale Coyne Racing | Lola | Cosworth | Goodyear | Dale Coyne |
| Dale Coyne Racing | Lola | Cosworth | Goodyear | Fulvio Ballabio |
| Dale Coyne Racing | Lola | Cosworth | Goodyear | Ken Johnson |