A cracked, hazy or leaking roof marker light can lead to DOT or state inspection failure. This direct replacement roof marker light assembly restores the appearance and functionality of the original lamp to ensure proper operation. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Peterbilt 377: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014] - [Peterbilt 379: 2002, 2003, 2004, 2005, 2006, 2007] - [Peterbilt 382: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014] - [Peterbilt 384: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010, 2011, 2012, 2013, 2014] - [Peterbilt 385: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014] - [Peterbilt 386: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014] - [Peterbilt 387: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011] - [Peterbilt 567: 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014] - [Peterbilt 587: 1997, 1998, 1999, 2000, 2001, 2003, 2005, 2007, 2009, 2011, 2012, 2013, 2014]