| 01 | O'Steen / Schumacher / Rohr / *White / *Ham / *Moskalik | Rohr Engineering (USA) | Jochen Rohr | Porsche | 964 Carrera | 2 Cup | Porsche | INV GT |
| 07 | Banks / Reckert / Arpin / *Church / *Kicak | Don Arpin | | Chevrolet | Camaro | | Chevrolet | GTS |
| 08 | Taleb / Adarquea / Adarquea / Escobar | Henry Taleb Racing | | Nissan | 300ZX | | Nissan | GTU |
| 1 | Morton / O'Connell / Millen | Cunningham Racing (USA) | | Nissan | 300ZX | Turbo (Z32) | Nissan | GTS |
| 2 | Goodyear / Pruett / Jones | Bud Light/Jaguar Racing (GB) | | Jaguar | XJR-12 | D | Jaguar | LM |
| 3 | Nielsen / *Andretti / *Brabham | Bud Light/Jaguar Racing (GB) | | Jaguar | XJR-12 | D | Jaguar | LM |
| 4 | Valentine / Schmidt / Minneker / Payson / Gigliotti / *Baker / *Said / *Cunningham / *Hendricks | Mercruiser | | Chevrolet | Corvette | | Chevrolet | INV GT |
| 5 | Cunningham / Said / Hendricks / Gigliotti / Minneker / *Schmidt / *Baker / *Valentine / *Payson | Mercruiser | | Chevrolet | Corvette | | Chevrolet | INV GT |
| 6 | Robinson / Haywood / Pescarolo / Sullivan | Joest Porsche (D) | Reinhold Jöst | Porsche | 962 | C | Porsche | GTP |
| 7 | Wollek / Reuter / Jelinski / "Winter" | Joest Porsche (D) | | Porsche | 962 | C | Porsche | GTP |
| 9 | Earl / Smith / Schader | Brix Racing (USA) | Harry Brix | Spice | AK93 | | Acura | Lights |
| 10 | Macaluso / De Long / Holmes / MacInnes | John Macaluso | John Macaluso | Tiga | GT286 | | Buick | Lights |
| 11 | Dallenbach, Jr. / Gordon / Buhl / Kendall / *Stevens | Roush Racing (USA) | Jack Roush | Ford | Mustang | | Ford | GTS |
| 12 | Camferdam / Robson / Drummond | Support Net Racing (USA) | | Mazda | MX-6 | | Mazda | GTU |
| 15 | Fergus / Stevens / Martin | Roush Racing (USA) | | Ford | Mustang | | Ford | GTS |
| 16 | Weaver / Dyson / Cobb / Forbes-Robinson | Dyson Racing (USA) | Rob Dyson | Porsche | 962 | C | Porsche | GTP |
| 17 | Gooding / Pezza / Cooper | Roush Racing (USA) | | Ford | Mustang | | Ford | GTS |
| 18 | Fellows / Yoshikawa / Baljet / Wilson / *Gloy | Tom Gloy Racing | | Ford | Mustang | | Ford | GTS |
| 19 | Puleo / Wessel / Fuller / O'Brien | Anthony Puleo (USA) | Anthony Puleo | Chevrolet | Camaro | III | Chevrolet | GTS |
| 20 | Adams / Kirby / Cord / *Hotchkis | Hotchkis Racing (USA) | John Hotchkis | Porsche | 962 | | Porsche | GTP |
| 21 | Trenery / Less / Osman / Painter / *Borders / *Gaylord | Bruce Trenery | | Chevrolet | Camaro | | Chevrolet | GTS |
| 22 | Urrutia / Rubright / Whipp / Josey | John Josey | | Chevrolet | Camaro | | Chevrolet | GTS |
| 23 | Aventin / Landa / Morresi / López / *Mazzacane | Team Argentina/K.R.E. | | Oldsmobile | Cutlass | | | GTS |
| 24 | Dibos / Dibos / Orlandini / *Mandeville | Dibos Racing (PE) | | Mazda | MX-6 | | Mazda | GTU |
| 25 | Oyhanart / Satriano / Acuna / Ramos / Mazzacane | Team Argentina/K.R.E. (USA) | Dale Kreider | Oldsmobile | Cutlass | | | GTS |
| 26 | Sandridge / Hamlet / Slater | Alex Job Racing (USA) | Alex Job | Porsche | 911 | | Porsche | GTU |
| 27 | Dören / Mathai / Mathai | Porsche Club Hildesheim | | Porsche | 964 Carrera | 2 | Porsche | INV GT |
| 28 | Calderari / Pagotto / Angelastri / Meixner | Cigarette Racing (D) | | Porsche | 964 Carrera | 2 | Porsche | INV GT |
| 30 | Moretti / Bell / Sigala / Paul, Jr. / *Migault | Momo (I) | | Nissan | NPT-90 | | Nissan | GTP |
| 31 | Schroeder / Baldwin / *Robinson / *Fish / *Gentilozzi | Rocketsports (USA) | Paul Gentilozzi | Oldsmobile | Cutlass | | | GTS |
| 32 | Jones / Brabham / Nielsen / Andretti | Bud Light/Jaguar Racing (GB) | | Jaguar | XJR-12 | D | Jaguar | LM |
| 35 | McDill / Juckette / McDill | Bill McDill | | Chevrolet | Camaro | | Chevrolet | GTS |
| 36 | Grooms / Jellinek / Downing / McAdam | Erie Scientific Company (USA) | | Kudzu | DG-1 | | Mazda | Lights |
| 39 | Auberlen / Graham / Russell / *Wagner | Charles Wagner (USA) | Charles Wagner | Mazda | MX-6 | | Mazda | GTU |
| 40 | Jones / Duckworth / Jamieson / Wilden / Lapcevich / *Wirth | Bieri Racing (CDN) | | Alba | AR2 | /6 | Ford | Lights |
| 41 | Amthor / Marchini / de Craene / Fuchs / *Kuttner | Bernt Motorsport | | Porsche | 964 Carrera | 2 | Porsche | INV GT |
| 42 | Lazier / Shalala / Sheehan / Ivey / Lazzaro | Pro-Technik Racing | Frank Beard | Fabcar | CL | | Porsche | Lights |
| 44 | Evans / Morgan / Bender / *Velez | Scandia Engineering | | Kudzu | DG-2 | | Buick | Lights |
| 45 | Velez / Marconi / Hessert / Bell | Scandia Engineering (USA) | | Kudzu | DG-2 | | Buick | Lights |
| 48 | Kuttner / Marshall / Scrogham / Biggs | Dave Maraj | | Porsche | 964 Carrera | 2 | Porsche | INV GT |
| 49 | Johnstone / *Cameron / *Marvin / *Peterson | Comptech Racing (USA) | | Spice | SE91P | | Acura | Lights |
| 50 | Kimbrough / McElheny / Hundredmark / Montgomery / Kicak / Overbagh | Overbagh Racing (USA) | Hoyt Overbagh | Chevrolet | Camaro | III | Chevrolet | GTS |
| 51 | Fish / Robinson / *Brassfield / *Baldwin / *Schroeder / *Gentilozzi | Rocketsports (USA) | Paul Gentilozzi | Oldsmobile | Cutlass | | | GTS |
| 57 | Del Vecchio / Danaher / Kuster / Kryder | Kryderacing (USA) | | Nissan | 240SX | | Nissan | GTU |
| 58 | Lazzaro / Toennis / Daniel / Tradd / Beard / Shalala | Pro-Technik Racing | Sam Shalala | Porsche | 911 | | Porsche | GTU |
| 66 | Aase / Moran / Hanauer / Cochran / Carradine | Team Gunnar | | Gunnar | 966 | | Porsche | GTP |
| 67 | Mazzacane / Wallace / Edwards | Kendall Oil Company (USA) | | Chevrolet | Camaro | | Chevrolet | GTS |
| 71 | Harholdt / Mingay / Hamilton / Bentley / Mirro | Club Zed Motorsports | Joseph Hamilton | Tiga | GT286 | | Mazda | Lights |
| 73 | Hynes / Lewis / Cogbill / *Barker | Jack Lewis Enterprises (USA) | | Porsche | 911 Carrera | RSR | Porsche | GTU |
| 76 | Brabham / Loring / Dobson / Riggins / *O'Connell / *Millen | Cunningham Racing | | Nissan | 300ZX | Turbo (Z32) | Nissan | GTS |
| 81 | Kennedy / Purvis / Fuller / Swindel / Joy / *Soccha | Mark Kennedy | | Chevrolet | Camaro | | Chevrolet | GTS |
| 82 | Greer / Bacon / Uria / Mees | Wendy's Race Team (USA) | | Mazda | RX-7 | | Mazda | GTU |
| 87 | Annis / Kirkland / Beall / Downs / Deeks / Sharp | John Annis Racing | John Annis | Chevrolet | Camaro | | Chevrolet | GTS |
| 90 | Petery / Fossett / Stewart / Delano / *Schwietz | Les Delano | | Pontiac | Firebird | | Pontiac | GTS |
| 92 | Lewis / Heimrath, Jr. / Reisman / Miller / Reisman | Scott Clarke | | Porsche | 944 | Turbo | Porsche | INV GT |
| 93 | Percilla / Pilgrim / Kellermeyer / Allman / Nelson / Heinricy / Hayner | Morrison Motorsports (USA) | Tommy Morrison | Chevrolet | Corvette C4 | ZR-1 | Chevrolet | INV GT |
| 94 | Heinricy / Hayner / Pilgrim / Knowles / *Allman / *Percilla / *Kellermeyer | Morrison Motorsports (USA) | Tommy Morrison | Chevrolet | Corvette C4 | ZR-1 | Chevrolet | INV GT |
| 95 | Leitzinger / Leitzinger / Kurtz | Leitzinger Racing (USA) | | Nissan | 240SX | | Nissan | GTU |
| 98 | Jones / Moran / Dismore | All American Racers (USA) | Dan Gurney | Eagle | Mk III | | Toyota | GTP |
| 99 | Fangio II / Wallace / Acheson | All American Racers (USA) | Dan Gurney | Eagle | Mk III | | Toyota | GTP |