| 2005 | GMC Sierra 2500 HD | 6.0L V8 | With 4 Pin Alternator Plug; With 137mm (5 3/8") Diameter Alternator Case |
| 2004-2005 | GMC Sierra 2500 HD | 6.6L V8 DIESEL | With 11:30 Alternator Plug |
| 2003-2005 | GMC Sierra 2500 HD | 8.1L V8 VIN: G | With 11:30 Alternator Plug |
| 2003-2004 | GMC Sierra 2500 HD | 6.0L V8 VIN: U | With 11:30 Alternator Plug |
| 2003 | GMC Sierra 2500 HD | 6.6L V8 VIN: 1 DIESEL | With 11:30 Alternator Plug |
| 2002 | GMC Sierra 2500 HD | 8.1L V8 VIN: G | With 137mm (5 3/8") Diameter Alternator Case; With Single Alternator System |
| 2001-2002 | GMC Sierra 2500 HD | 6.6L V8 VIN: 1 DIESEL | With 137mm (5 3/8") Diameter Alternator Case |
| 2001-2002 | GMC Sierra 2500 HD | 6.0L V8 VIN: U | With Remy Alternator; With 137mm (5 3/8") Diameter Alternator Case |
| 2001 | GMC Sierra 2500 HD | 8.1L V8 VIN: G | With 137mm (5 3/8") Diameter Alternator Case; With Remy Alternator; With Single Alternator System |