It could be that the leveling kit causes issues with the current steering rack. But General Motors has read design the steering rack. New part number, that is why mine was on backorder for so long. This is the fix
My clicking noise seemed to be further down the column. Not at the steering wheel. After a long wait, 6 weeks, the new steering rack came in. Fixed the problem so far. Seems to be a new part number.
I have a 2014 Silverado with leveling kit. The dealership uses the same installer as I used and sad they would replace my steer rack under warranty. Unfortunately, it is on back order. Seems there are a lot of steering problems with these trucks.