For Chevrolet Silverado GMC Sierra Replacement LED 3rd Brake Light Signal Third Cargo Stop Lamp Smoke Fits 99-06 Chevrolet Silverado, 99-06 GMC Sierra ***NOT COMPATIABLE WITH Old Body Style*** Fits 99-06 Chevrolet Silverado, 99-06 GMC Sierra ***NOT COMPATIABLE WITH Old Body Style*** Directly Bolt On, But Wiring Modifications Might Be Required, Please Check With Local Professional Mechanic Replace Stock Old/Dull 3rd Brake Light With This New Style Full LED Design 3rd Brake Light No Installation Guide or Instruction Included, Professional Installation is Highly Recommended