Any 4x4 truck without a straight axle in the front is going to run the risk of damaging and even snapping the cv’s. The more you weight you run (Bigger tires/wheels), and the higher the truck is lifted means you’re putting extra strain on components that weren’t designed for that by GM engineers. So yes it’s a risk, however most people who are leveling their trucks aren’t looking to do any serious off roads. These trucks are not built to go to Moab, we don’t even have a selectable locker, so I would assume 90% of guys buying 4 wheel drive trucks almost never use it. Lifting a truck is mostly for looks so cruising around on the highway and the occasional 4auto in wet or gravel roads shouldn’t be a problem. I would not recommend dropping to 4lo and trying to crawl over the rubicon...even with a stock truck.