First of all I can't stand reviews that say "they fit my truck perfectly" and nothing else. Hmm ok it's great they worked for you. But what about providing more information to help others? So here is my contribution to put an end to these useless reviews. After hours of searching, I finally found LED bulbs that are the same size as the 578 bulbs in our 2010 Tahoe. I tried 5000k bulbs similar to SuperBrightLeds but they didn't fit as the LED board was too big to fit between the lamp pins. They fit after I pinch the lamp contacts a bit and the LED board is small enough to easily fit between the lamp contacts. They're definitely closer to 6000k as they have a slight blue cast, but it's not as ridiculously blue as many other "white" LEDs so they're still a nice color. This is the whitest color you can find at this price point, anything closer to 5000k colors is usually more expensive. Keep in mind that they are very bright indeed, but I expect people to be aware of that when they're going to be replacing LEDs. I will update if they drop out early. Update: It's been over a year and they still work great. So far no problems.
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