I have a 2014 Silverado LTZ with 6.2 that had the same issue at 140,000 miles. Dropped the whole lifter into the engine and chewed everything up. I’ve been waiting since March 22, 2022 and GM told me then that it could be over 12 months. As of last week there is still no available time frame and they’re not building new ones in the 2022 models anymore so it doesn’t look like the supply issue is getting any better.
My best advice would be to try to get in on the class action lawsuit. My attorney is going to be filing loss of use against GM since it’s a known plagued issue that they refuse to fix. Hopefully that will offset some of the issues we’ve had. Unfortunately, we’re just screwed at the moment. Im sorry dude.
