2001 GMC Sierra C3 2002 to 2006 GMC Sierra 1500 Denali 2007 GMC Sierra 1500 Denali Classic 2001 to 2006 GMC Yukon Denali 2001 to 2006 GMC Yukon XL 1500 Denali 9006 Bulb to Be Used for Low Beam. Notching of Bulb Base may be required to fit into 9005 Bulb Plug
