FITMENT DETAILS.
For 1999-2006 Chevy Silverado 1500
For 1999-2006 Chevy Silverado 2500
For 2001-2006 Chevy Silverado 3500
For 2007 Chevy Silverado with Classic Body Style (will NOT FIT other models!!!)
For 1999-2002 GMC Sierra 1500
For 1999-2002 GMC Sierra 2500
For 2001-2002 GMC Sierra 3500
Professional installation is highly recommended. For early models with only 3 sockets may need to add an extra caps to plug up the side mark socket.