I had same truck, same…
I had same truck, same symptoms at 1,000 I think. Dealership replace the injector solenoids I believe three times , camshaft twice, the cradle for the camshaft twice. Was in four times! I got a loaner each time. Was stranded 80 mikes from home once. Kind of sucked, big inconvenience but they worked hard trying to find the issue without much help from gm. Finally they found a loose frayed wire connection, all it was. Luckily it’s a lease, gm payed one payment but for the four times I broke down it was a hassle. I didn’t want to drive it anywhere, was scared to. It would last 200-300 miles and do it again. All good now tho, but frustrating for sure. Glad it wasnt a boughten truck. It’s a bad deal when u end up with a torn down new engine and are expected to be happy with that. Back in the day I had a Chevy suburban that the tranny went at 10,000, they rebuilt it, I said no, I paid for new, I want a new one. Nope, I said it’ll go again and I was right. At 35,000 it did. They said they’d rebuild again under warranty, I said no, it can sit and rot. They didn’t go to bat for me with gm. I left and drove to another dealership and traded it in for a gmc version. Had another suburban that the engine went at 101,000, yup, 1,000 over warranty. Luckily that dealership got me a new engine half price. It all pisses a guy off but I guess if the treat u fairly it isn’t bad. It’s when they screw u is what sucks. I won’t buy another new type of engine until it’s out quite a few years. Not worth it, was thinking of that 3.0 little diesel but I’m hearing to many bad things about it. Everything seems to be made poorly these days, costs more but less reliable. Rant over!