【Compatible with】1999-2006 Chevrolet Silverado GMC Sierra 1500 2500 3500, 2001-2006 Chevrolet Silverado GMC Sierra 1500HD 2500HD 3500HD, 2007 Chevrolet Silverado GMC Sierra 1500 2500 3500 HD Classic, only fits 2007 HD Classic model. Replace OEM Part Numbers: 5978318, 923240 【Premium Quality】 Made by OEM approved manufacturers with high grade OE materials that meet strict OEM requirements, with a full Led lights source and 18 built-in LEDs (8 for brake, 10 for cargo light), super bright, quick illumination, high efficiency and long-lasting performance replacement, compare to the OEM Halogen, shine up to ten times brighter, lights up faster to avoid rear end accident 【IP67 Waterproof】 This third brake lights come with high-density foam mounted back, perfectly sealed around, preventing water snow or heavy rain leaking in, make sure this third brake light will work perfectly in all weather 【Easy Installation】 Plug & play operation. No more drilling needed. You can use factory screws to install the LED third brake light. Note: We highly recommend to use factory screws for a pefectly fit, and hand screwer tool for the installation. Electronic tools will often screw too tight and case will be cracked easily 【Pack Includes】1pc LED Third Brake Light, 1pc high-density foam pad