Had a 2010 Silverado 1500 with the 6.2 L9H with 6L80E transmission. traded it in at 254,000.
I purchased it in 2014 at 120,000 miles. Between 120 and 254 I replaced the following: 1 Oil pressure sensor, 1 set of O2 sensors and 3 evap canisters. They gave me $5500 for it on a trade-in. I would buy another one of these rigs in a heartbeat it was an absolute blast to drive and pull with and gave me no trouble at all.
My 2016 L83 has been a fine engine, but it’s a dog so I’ve thrown more at it in terms of upgrades than I care to discuss. And it’s quicker and pulls better, but I just think what If I had done these simple upgrades to that L9H and it makes me sad I don’t have it anymore.