GM is not the GM of years past once they went to the Dynamic Fuel Management (DFM) system. I have owned 6 GM vehicles (4 of them Tahoe/Suburban), so safe to say, I am a loyal repeat customer. Not anymore! I was left stranded on the first day of a family trip, after a nerve racking experience of trying to safely get off the highway as the engine was shaking and even slightly engine braking (along with all kinds of computer notices/warnings). It behaved just like all the failed lifter descriptions. I will spare everyone the drama that ensued with GM roadside/rental cars/etc...let's just say, GM does not know how to help you on weekends (which is likely when you doing the most driving for trips...come on GM, when you know you have new cars braking down, be able to help people after 11am-Noon on Saturdays with rental cars, etc!). Anyway, the dealer thought it was lifter failure and then figured out it was a broken/failed Rocker Arm! I have not seen this posted before as an issue and the dealer said they have not seen a Broken Rocker Arm in 15 years (but they see lots of failed lifters). So, what does this mean? Do we have a another new issue? Could it be related to the DFM too? This is starting to sound like the Boeing ordeal when they tried to make the 737 more fuel efficient! Come on GM, get it together! Your brand is at stake. Own up to your issues/problems, do the recall on the lifters, redesign the engine to either handle the DFM (or disable it at least!)! I am going to sell my 2022 Tahoe 6.2L Z71 and get a reliable SUV...this will be my 6th and final GM product. Which is a real bummer as I love EVERYTHING about the new redesign, but need safety/reliability and company that cares when you get stranded, first!