If you're not sure whether your truck has second-generation Tundra tail lights, there are a few ways to tell. First, check the model year of your truck. Second-generation Tundra tail lights were introduced in 2007, so if your truck is from that model year or newer, it's likely that it has them. You can also look for specific features that distinguish second-generation Tundra tail lights from earlier models. These include LED bulbs, clear lenses and chrome bezels. If you see any of these features on your truck's taillights, chances are good that they're second-generation units.