2009 Chevrolet Tahoe Hybrid - 3rd lifter

I have a 2009 tahoe hybred Had to fix the lifters 3 times… Its done it again Nobody here know what is causing this to keep happening Does anybody have an idea? Right now I ve got a piece of junk that barely runs.

Had to fix the lifter 3 times? These are the valve lifters? Why were they replaced? How many miles did each last? Did the same ones fail each time and which ones? How many miles on the truck now?

What is actually wrong with the truck now? More bad lifters?