While we're talking reliability stories here: My 2013 Express 2500 (company-issued van) had 50 miles on it when it was issued to me. Because of the garbage factory trans tuning, I manually shifted it any time I wasn't on the highway because it was easier and faster to do this rather than let the trans constantly upshift, motor bog, then have it downshift again before quickly upshifting. That 6.0 stayed at 3500+ RPM. I changed the oil between 25% and 0% on the oil life monitor, which ended up being 7-9K OCI. The original spark plugs were replaced at 200K miles. The trans fluid was what was in it when it let the factory. That van never even had so much as an odd sound and pulled like a beast. The trans died a couple months ago at 230,000 miles.
In recent news: My buddy's 2000 Silverado was in excellent mechanical and aesthetic condition despite 317,000 on the odometer- no leaks or abnormal sounds. His house was recently flooded up to the roof with the truck under the carport. It floated up and smashed the carport light and bumped a support pole in the carport. His stepson came to visit prior to the flood and is now stranded because his truck ended up on it's side in the front yard. Having nothing better to do, he worked on the truck for a day and is now using it to haul salvageables to the temporary apartment. It's running as it did before and all the electronics work except for the radio, some of the gauges and the driver's side window. I told him we'll address whatever issues arise later (surely inevitable) with parts from a guy down the road from me that parts out these trucks. I wanna see this beast hit 400K!