| 1 | GMC | General Motors Corporation | Callsign: General Motors, | USA | AVCODES |
| 2 | GMC | General Motors | | | ICAO1 |
| 3 | GMC | GENERAL MOTORS CORP. | | | PWRC |
| 4 | GMC | General Motors Corp. | | USA | TRAFFIC |
| 5 | GMCA | GMC AIR | | | SCAC4 |
| 6 | GMCB | GLASS & MIRROR CRAFT LLC AND | | | SCAC4 |
| 7 | GMCC | GMC INC | | | SCAC4 |
| 8 | GMCD | GARCIA MARTINEZ, CECILIA | | | SCAC4 |
| 9 | GMCG | GILMORE TRUCKING LLC | | | SCAC4 |
| 10 | GMCI | GESTION MICHEL CHICOINE INC | | | SCAC4 |
| 11 | GMCJ | GM CARRIERS INC | | | SCAC4 |
| 12 | GMCK | G & M TRUCKING COMPANY | | | SCAC4 |
| 13 | GMCL | GMC LOGISTICS CO LTD | | | SCAC4 |
| 14 | GMCO | GARCIA MARTINEZ, OSCAR | | | SCAC4 |
| 15 | GMCP | GENERAL MARITIME MANAGEMENT LLC | | | SCAC4 |
| 16 | GMCR | GAMA TRUCKING | | | SCAC4 |
| 17 | GMCS | GOMEZ CASTRO, VICENTE | | | SCAC4 |
| 18 | GMCT | GALATEIA MARITIME CORPORATION | | | SCAC4 |
| 19 | GMCU | PEACOCK CONTAINER PTE. LTD. | | SGP | BIC |
| 20 | GMCX | General Motors Corp. | added 10/1979; 1/1980; eliminated 7/1987 | | NAKINA |
| 21 | GMCX | General Manufacturing Co. | 8/1920 | | NAKINA |
| 22 | GMCX | General Motors Corp. | 1/80; eliminated 7/87 | | NRHS |
| 23 | GMCX | *GENERAL MANUFACTURING CO. | | | PWRC |
| 24 | GMCX | *GENERAL MOTORS CORP. | | | PWRC |
| 25 | GMCX | General Motors Corporation | | | RSRV |
| 26 | GMCY | GORDON MANUFACTURING COMPANY | | | SCAC4 |
