2018 LT Tahoe. Just about to reach 72,000 miles, which is when my extended warranty expires. I got the value out of it for some entertainment and NAV issues. However, I've heard personally from several uber drivers that the transmission goes out frequently at 100,000 miles and the motor at 150,000. Are there reputable warranty companies for this mileage? I will probably put another 70k on it in the next 4 years if I keep it that long.