| 0 | Hodgetts / Donohue / Quester / *Arnold / *Adam | Ed Arnold Racing (USA) | | BMW | M5 | | BMW | INV GT |
| 01 | Rohr / O'Steen / Moskalik / White | Rohr Engineering (USA) | Jochen Rohr | Porsche | 964 Carrera | 2 Cup | Porsche | INV GT |
| 1 | Morton / O'Connell / Millen | Cunningham Racing (USA) | | Nissan | 300ZX | Turbo (Z32) | Nissan | GTS |
| 2 | Downs / Sharp / Sharp, Jr. | Ed Sharp | | Oldsmobile | Cutlass | | | GTS |
| 5 | Taylor / Andretti / Shirazi / *Weaver | Auto Toy Store | Morris Shirazi | Spice | SE90P | | Chevrolet | GTP |
| 7 | Robinson / Reuter / "Winter" | Joest Porsche Racing (D) | | Porsche | 962 | C | Porsche | GTP |
| 7T | "Winter" / Reuter | Joest Porsche Racing (D) | Reinhold Jöst | Porsche | 962 | C | Porsche | GTP |
| 9 | Earl / Schader / Dale | Brix Racing (USA) | Harry Brix | Spice | AK93 | | Acura | Lights |
| 11 | Kendall / Fergus / *Jones / *Binks / *Dallenbach, Jr. | Roush Racing (USA) | Jack Roush | Ford | Mustang Cobra | | Ford | GTS |
| 12 | Lee / Sirgany / Rassweiler / *Davin | Steve Sirgany | Steve Sirgany | Phoenix | | | Alfa Romeo | Lights |
| 15 | Stewart / Hubbard / Wilson / *Miller / *Hubbard | Scott Clarke | | Porsche | 944 | Turbo | Porsche | INV GT |
| 16 | Heimrath, Jr. / McKinnon / Rathbun / Hubbard / *Miller | Scott Clarke | | Porsche | 944 | Turbo | Porsche | INV GT |
| 19 | Tennyson / Migault / Fossett / Fuller | David Tennyson Racing/Spice USA (CDN) | | Spice | SE92P | | Chevrolet | GTP |
| 20 | Adams / Cord | Hotchkis Racing (USA) | John Hotchkis | Porsche | 962 | C | Porsche | GTP |
| 21 | Trenery / Osman / Painter | Bruce Trenery | | Chevrolet | Camaro | | Chevrolet | GTS |
| 22 | Sereix / Whipp / Urrutia | John Josey | | Chevrolet | Camaro | | Chevrolet | GTS |
| 24 | Auberlen / Dibos / *Dibos | Dibos Racing (PE) | | Mazda | MX-6 | | Mazda | GTU |
| 26 | Hamlet / Ferran / Slater | Alex Job Racing (USA) | Alex Job | Porsche | 911 | | Porsche | GTU |
| 28 | Calderari / Pagotto / Meixner | Cigarette Racing | | Porsche | 964 Carrera | 2 | Porsche | INV GT |
| 30 | Moretti / Bell / Paul, Jr. | Momo (I) | | Nissan | NPT-90 | | Nissan | GTP |
| 31 | Schroeder / Fish / Gentilozzi / *Brassfield | Rocketsports (USA) | Paul Gentilozzi | Oldsmobile | Cutlass | | | GTS |
| 32 | Smith / Kennedy / Borders / *Reckert | Carolina Racing (USA) | | Pontiac | Grand Prix | | Pontiac | GTS |
| 35 | McDill / Juckette / McDill | Bill McDill | | Chevrolet | Camaro | | Chevrolet | GTS |
| 40 | Jones / Jamieson / Lapcevich / *Bieri | Bieri Racing (CDN) | | Alba | AR2 | /6 | Ford | Lights |
| 41 | Fuchs / de Craene / *Amthor | Bernt Motorsport | | Porsche | 964 Carrera | 2 | Porsche | INV GT |
| 42 | Sheehan / Favre / Spreng / Shalala / Lazzaro | ZZ Pro-Technik Racing | Frank Beard | Fabcar | CL | | Porsche | Lights |
| 45 | Scavone / Hayward / Martel / *Wirth | Antica AB | Vito Scavone | Porsche | 944 | Turbo | Porsche | INV GT |
| 48 | Bell / Peters / Kuttner | Champion Porsche | | Porsche | 964 Carrera | 2 | Porsche | INV GT |
| 49 | Johnstone / Marvin / Melgrati | Comptech Racing (USA) | | Spice | SE91P | | Acura | Lights |
| 50 | Kimbrough / Montgomery / McElheny / Hundredmark / Overbagh | Overbagh Racing (USA) | Hoyt Overbagh | Chevrolet | Camaro | III | Chevrolet | GTS |
| 51 | Pruett / Brassfield / *Gentilozzi / *Fish | Rocketsports (USA) | Paul Gentilozzi | Oldsmobile | Cutlass | | | GTS |
| 57 | Kryder / Kuster / *Del Vecchio | Kryderacing (USA) | | Nissan | 240SX | | Nissan | GTU |
| 58 | Lader / Fogle / Catallo / Beard | ZZ Pro-Technik Racing | | Porsche | 911 | | Porsche | GTU |
| 59 | Röhrl / Stuck / Haywood | Brumos Porsche (USA) | | Porsche | 964 Turbo | S LM | Porsche | INV GT |
| 63 | McAdam / Katz / Downing | Downing/Atlanta (USA) | | Kudzu | DG-1 | | Mazda | Lights |
| 66 | Cochran / Hanauer / Carradine / Aase | Team Gunnar | | Gunnar | 966 | | Porsche | GTP |
| 67 | Mazzacane / Edwards / Argetsinger | Paul Mazzacane (USA) | | Chevrolet | Camaro | | Chevrolet | GTS |
| 70 | DeLuca / Weston / *Brady | Kenneth Brady | | Mazda | MX-6 | | Mazda | GTU |
| 76 | Riggins / Morton | Cunningham Racing | | Nissan | 300ZX | Turbo (Z32) | Nissan | GTS |
| 82 | Bacon / Greer / Uria / Mees | Dick Greer Racing (USA) | | Mazda | RX-7 | | Mazda | GTU |
| 87 | Annis / Beall / Miller | John Annis | John Annis | Chevrolet | Camaro | | Chevrolet | GTS |
| 90 | Petery / Macaluso / Schweitz | Les Delano | | Pontiac | Firebird | | Pontiac | GTS |
| 91 | Hicks / Butt / Zitza / Johnson | Team Casual Motorsport | | Porsche | 911 | | Porsche | GTU |
| 93 | Pilgrim / Meixner / Said / Nelson / Knowles / *Minneker / *Heinricy / *Hayner | Morrison Motorsports (USA) | Tommy Morrison | Chevrolet | Corvette C4 | ZR-1 | Chevrolet | INV GT |
| 94 | Heinricy / Hayner / Pilgrim / *Nelson / *Percilla / *Minneker / *Said | Morrison Motorsports (USA) | Tommy Morrison | Chevrolet | Corvette C4 | ZR-1 | Chevrolet | INV GT |
| 95 | Knowles / Leitzinger | Leitzinger Racing (USA) | | Nissan | 240SX | | Nissan | GTU |
| 98 | Jones / Moran | All American Racers (USA) | Dan Gurney | Eagle | Mk III | | Toyota | GTP |
| 99 | Fangio II / Wallace | All American Racers (USA) | Dan Gurney | Eagle | Mk III | | Toyota | GTP |