Towing | 2004.5-2005 Chevy/GMC Duramax LLY 6.6L - Hitch Balls | 2004.5-2005 Chevy/GMC Duramax LLY 6.6L - B&W Hitches - B&W Trailer Hitches Gooseneck Ball 4" Extender | BNWGNXA4085 | Universal Fitment