A Texas dealership has made headlines by offering a 20-year, 500,000-mile warranty on a used diesel Chevrolet truck. Josh Letsis, president of Always Auto in Wichita Falls, Texas, showed off the offer in a viral TikTok clip. In the video, he walks a potential buyer through the details of the warranty on a diesel truck that already has 150,000 miles on it. Letsis described the coverage: “It’s 240 months, 500,000-mile warranty that, as you can ima…