2003 Gmc yukon third brake light not working Read Also: 2005 Gmc yukon third brake light not working 2003 Gmc yukon brake lights not working 2003 Gmc yukon 3rd brake light 2003 Gmc yukon denali third brake light 2003 Gmc yukon denali xl third brake light 2003 Gmc yukon brake light bulb