The 1989 Trans-Am Series was the 24th running of the Sports Car Club of America's premier series. The year marked a new era in Trans Am, with American branded automobiles with American V8 engines, regardless of what vehicle was being used. For example, the Buick Somerset came with a three-liter V6 at best, but was entered with a V8 in the series. This new "American muscle revival" era would last for eleven seasons, after which the Italian manufacturer Qvale would win the championship.
| Round | Date | Circuit | Winning driver | Winning vehicle | 
|---|---|---|---|---|
| 1 | 14 April | Long Beach |   | Oldsmobile Cutlass | 
| 2 | 7 May | Sears Point |   | Chevrolet Corvette | 
| 3 | 14 May | Dallas |   | Ford Mustang | 
| 4 | 17 June | Detroit |   | Chevrolet Corvette | 
| 5 | 1 July | Cleveland |   | Oldsmobile Cutlass | 
| 6 | 9 July | Des Moines |   | Ford Mustang | 
| 7 | 23 July | Brainerd |   | Oldsmobile Cutlass | 
| 8 | 5 August | Lime Rock |   | Ford Mustang | 
| 9 | 20 August | Road Atlanta |   | Ford Mustang | 
| 10 | 2 September | Mid Ohio |   | Ford Mustang | 
| 11 | 9 September | Road America |   | Ford Mustang | 
| 12 | 24 September | Mosport |   | Ford Mustang | 
| 13 | 15 October | Topeka |   | Chevrolet Beretta | 
| 14 | 29 October | St. Petersburg |   | Oldsmobile Cutlass |