Most 2019–2026 Silverado and Sierra owners don’t even realize how bad the rear interior dome light is until you actually compare it. In this video, I show you exactly why the factory setup is so underwhelming (GM basically gave us two tiny LEDs back there), and then I install the Boost Auto rear interior LED dome light upgrade on my GMC Sierra AT4. It’s plug-and-play, takes about five minutes, and it’s one of those mods that immediately makes the truck feel more “finished.” I walk through the whole install step-by-step—popping the old housing down, dealing with the harness lock, and getting the new light clipped in properly. I also talk about a real-world fitment detail I ran into: my unit felt a bit loose at first because the side “claws” on the OEM light aren’t on the Boost Auto piece, but swapping the clips fixed it, and Boost told me newer units have redesigned clips with tighter tolerances. Then I do the daylight preview and the full dark test, and the difference is honestly night-and-day—36 LEDs (18 per side) throws light through the rear cabin and even helps cast more light up front. Bonus: I included my SEMA 2025 interview with Adam, the CEO of Boost Auto Parts, so you can hear how they approach quality and product development.