Same, I researched the mess out of engine options! Here's the kicker. I got rid of a 2018 GMC Sierra at 100K miles because the lifters were going in the engine! I like GMC trucks. I knew I did not want a gas engine with cylinder deactivation. I thought, I'm perfectly safe with the LZ0. I didn't research the transmissions in these things that hard. When I first was told it was the valve body, I asked about part availability. They say it's in stock. I get a call the next day!!!! Ummmm, sir, the part is actually on backorder!