Geoff Brabham (GTP)
Tom Hessert (Lights)
Scott Pruett (GTO)
Tom Kendall (GTU)
Mistrz producentów
Porsche (GTP)
Pontiac (Lights)
Lincoln-Mercury (GTO)
Chevrolet (GTU)
| Runda | Tor | Data | Klasa | Kierowca | Pojazd | Zespół |
|---|---|---|---|---|---|---|
| 1 | Daytona Daytona 24 godziny | 1988.01.30 - 01.31 | GTP | Jaguar XJR-9 |  Castrol Jaguar | |
| 2 | Miami | 1988.02.28 | GTP | Porsche 962 | Dyson Racing | |
| 3 | Miami | 1988.02.28 | GTU | Chevrolet Beretta | C&C Inc. | |
| 4 | Sebring Sebring 12 godzin | 1988.03.19 | GTP | Porsche 962 | Bayside Disposal | |
| 5 | Road Atlanta | 1988.04.10 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| 6 | West Palm Beach | 1988.04.24 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| 7 | West Palm Beach | 1988.04.24 | GTO | Lincoln Mercury XR4Ti - Ford | Roush Racing | |
| 8 | Summit Point | 1988.05.22 | GTO | Lincoln Mercury XR4Ti - Ford | Roush Racing | |
| 9 | Lime Rock Park | 1988.05.30 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| 10 | Mid-Ohio | 1988.06.05 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| 11 | Mid-Ohio | 1988.06.05 | GTO | Toyota Celica Turbo | All American Racers | |
| 12 | Watkins Glen | 1988.07.03 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| 13 | Road America | 1988.07.17 | GTP | Nissan GTP ZX-T | Electromotive Eng. | |
| 14 | Portland | 1988.07.31 | GTO | Lincoln Mercury XR4Ti - Ford | Roush Racing | |
| 15 | Portland | 1988.07.31 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| 16 | Sears Point | 1988.08.14 | GTO | Toyota Celica Turbo | All American Racers | |
| 17 | Sears Point | 1988.08.14 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| 18 | San Antonio | 1988.09.04 | GTP | Porsche 962 GTi | Dyson Racing | |
| 19 | Lime Rock Park | 1988.09.05 | GTO | Chevrolet Corvette | Protofab Racing | |
| 20 | Lime Rock Park | 1988.09.05 | GTU | Dodge Daytona | Full Time Racing | |
| 21 | Watkins Glen | 1988.09.25 | GTO | Toyota Celica Turbo | All American Racers | |
| 22 | Columbus | 1988.10.02 | GTP | Nissan GTP ZX-T | Electramotive Eng. | |
| 23 | Columbus | 1988.10.02 | GTO | Oldsmobile Cutlass | Hoerr Racing | |
| 24 | Del Mar | 1988.10.22 | GTU | Chevrolet Beretta | C&C Inc. | |
| 25 | Del Mar | 1988.10.22 | GTO | Toyota Celica Turbo | All American Racers | |
| 26 | Del Mar | 1988.10.22 | GTP | Jaguar XJR-9 | Castrol Jaguar |
