There must be a dozen threads on here about sloppy steering on newer trucks. Some get that way in 5,000 miles. There are lots of things they try to fix the problem.
Top Ten Fixes for loose steering in Silverados:
1. tell the customer nothing is wrong and see if they will buy it.
2. adjust the play out of the steering gear. Sometimes works for a few thousand miles but sometimes not even for that long.
3. replace the steering gear with another steering gear of the same batch as the first gear box. Works about as long as the first gear box worked.
4. rebuild the gear box with better internals. Works most of the time if they do the whole job, including flushing the system.
5. replace a bunch of suspension and steering joints with new ones. Sometimes helps a little but doesn't really fix it.
6. tell the customer that they don't know what is wrong. This must work occasionally because they do it a lot.
7. tell the customer that there is a known problem but no known cure. An outright lie.
8. tell the customer that the required parts are not available because they are on national backorder but that they will be available some day. The parts are available now.
9. tell the customer that the problem is due to the accessories he has installed and therefor not covered under warranty. After all that kickin stereo is putting a lot of strain on the steering gear.
10. Flush the steering fluid. In itself it doesn't do much but in combination with other "cures" it can help a little.
The actual problem is a batch of steering gears with improperly heat treated parts that can't take the stress the are subject to. They wear out quickly, contaminating the system and leading to failure of the steering and brake booster.
The true fix is to replace the defective steering gear, the contaminated pump and the hydraboost. The system has to be flushed at the same time to remove all of the metal shavings from the system.
This isn't a rare problem that nobody has heard about. It is well known with TSBs to address it.