The bolt holes on the Curt Trailer Hitch Receiver # C15302 sit across from each other 39" on center and are separated front to back by 7-1/2" on center. This is a custom fit for the following vehicles:
2008 - 2010 GMC Sierra 2500 - 6-1/2 Foot Bed
2007 - 2007 GMC Sierra New Body 2500 - 6-1/2 Foot Bed
2008 - 2010 Chevrolet Silverado 2500 - 6-1/2 Foot Bed
2007 - 2007 Chevrolet Silverado New Body 2500 - 6-1/2 Foot Bed
2001 - 2006 GMC Sierra 2500 HD - 6-1/2 Foot Bed
2007 - 2007 GMC Sierra Classic... view full answer...
The width of the tab you marked in your picture is 2.9" and the height is 6.32". I have attached the full dimensional drawing of the # 3371809065 below for your reference. view full answer...