Geoff Brabham (GTP)
Scott Schubot (Lights)
Pete Halsmer (GTO)
Bob Leitzinger (GTU)
Mistrz producentów
Nissan (GTP)
Buick (Lights)
Mercury (GTO)
Mazda (GTU)
| Runda | Tor | Data | Klasa | Kierowca | Pojazd | Zespół |
|---|---|---|---|---|---|---|
| 1 | Daytona Daytona 24 godziny | 1989.02.04 - 02.05 | GTP | Porsche 962 | Miller-BF Goodrich | |
| Lights | Tiga GT286 - Buick | Essex Racing | ||||
| GTO | Mercury Cougar XR-7 - Ford | Stroh's Light Cougar | ||||
| GTU | Mazda RX-7 | Al Bacon Performance | ||||
| 2 | Miami | 1989.03.05 | GTO | Mercury Cougar XR-7 - Ford | Roush Racing | |
| GTU | Mazda RX-7 | John Finger | ||||
| 3 | Miami | 1989.03.05 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88P - Buick | S&L Racing | ||||
| 4 | Sebring Sebring 12 godzin | 1989.03.18 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88 - Pontiac | Huffaker Racing | ||||
| GTO | Lincoln Mercury Cougar XR-7 - Ford | Roush Racing | ||||
| GTU | Pontiac Fiero | Huffaker Racing | ||||
| 5 | Road Atlanta | 1989.04.02 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88P - Buick | S&L Racing | ||||
| 6 | West Palm Beach | 1989.04.23 | GTP | Porsche 962 | Busby Racing | |
| Lights | Spice SE88P - Buick | S&L Racing | ||||
| 7 | Summit Point | 1989.05.21 | GTO | Audi 90 quattro | Audi of America | |
| GTU | Pontiac Fiero | Robinson Racing | ||||
| 8 | Lime Rock Park | 1989.05.29 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88P - Buick | Essex Racing | ||||
| 9 | Mid-Ohio | 1989.06.04 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88P - Buick | Essex Racing | ||||
| 10 | Mid-Ohio | 1989.06.04 | GTO | Audi 90 quattro | Audi of America | |
| GTU | Mazda MX-6 GT | Team Highball | ||||
| 11 |  Mosport Park | 1989.06.25 | GTO | Mercury Cougar XR-7 - Ford | Roush Racing | |
| GTU | Dodge Daytona | Full Time Racing | ||||
| 12 | Watkins Glen | 1989.07.02 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Argo JM19C - Mazda | Mazda | ||||
| 13 | Road America | 1989.07.16 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88P - Buick | S&L Racing | ||||
| GTO | Nissan 300ZX Turbo | Cunningham Racing | ||||
| GTU | Mazda MX-6 GT | Team Highball | ||||
| 14 | Portland | 1989.07.30 | GTO | Mercury Cougar XR-7 - Ford | Roush Racing | |
| GTU | Dodge Daytona | Full Time Racing | ||||
| 15 | Portland | 1989.07.30 | GTP | Jaguar XJR-10 |  Castrol Jaguar | |
| Lights | Argo JM19C - Mazda | Downing Atlanta | ||||
| 16 | Heartland Park | 1989.08.12 | GTO | Audi 90 quattro | Audi of America | |
| GTU | Nissan 240SX | Leitzinger Racing | ||||
| 17 | Heartland Park | 1989.08.13 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88P - Buick | S&L Racing | ||||
| 18 | San Antonio | 1989.09.03 | GTO | Mercury Cougar XR-7 - Ford | Roush Racing | |
| GTU | Nissan 240SX | Leitzinger Racing | ||||
| 19 | San Antonio | 1989.09.03 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88P - Buick | S&L Racing | ||||
| 20 | Sears Point | 1989.09.10 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| Lights | Spice SE88P - Buick | S&L Racing | ||||
| 21 | Sears Point | 1989.09.10 | GTO | Audi 90 quattro | Audi of America | |
| GTU | Dodge Daytona | Full Time Racing | ||||
| 22 | Watkins Glen | 1989.09.24 | GTO | Audi 90 quattro | Audi of America | |
| GTU | Mazda MX-6 | Al Bacon Performance | ||||
| 23 | Florida | 1989.10.01 | GTP | Jaguar XJR-9 | Castrol Jaguar | |
| Lights | Spice SE87P - Buick | Essex Racing | ||||
| 24 | Lime Rock Park | 1989.10.01 | GTO | Audi 90 quattro | Audi of America | |
| GTU | Dodge Daytona | Full Time Racing | ||||
| 25 | Laguna Seca | 1989.10.15 | GTO | Audi 90 quattro | Audi of America | |
| GTU | Dodge Daytona | Full Time Racing | ||||
| 26 | Del Mar | 1989.10.22 | GTO | Mercury Cougar XR-7 - Ford | Roush Racing | |
| GTU | Dodge Daytona | Full Time Racing | ||||
| 27 | Del Mar | 1989.10.22 | GTP | Jaguar XJR-10 | Castrol Jaguar | |
| Lights | Spice SE88P - Buick | S&L Racing |
