Spyder Auto Chevy Avalanche Black Altezza Tail Light All the tail lights package will come as a pair left side and right side; designed as direct bolt-on replacement parts These lights are made by an OE approved and ISO certified manufacturer with the quality met or exceeding all OE standards;Voltage Protection - Over & Under 12.8V If wiring is included for the tail lights, it is preassembled for plug and play application; some of the package includes light bulbs, for package which does not come with any light bulbs, you can apply the stock light bulbs for installation Please verify fitment before purchasing this product, may not fit models or body styles not explicitly listed