My 2009 Chevy traverse has a misfire on 2 cylinders only

What is your question?

My 2009 Chevy traverse has had problem after problem. Now it is only misfiring on 2 of the back cylinders 3&5 I believe I have changed plugs, coil, injectors, and had the computer sent off to be tested they said it was bad( somehow 2 cylinders misfiring) they fixed it I put it on it didn’t work sent it off again. They said it was bad and fixed it again can the car keep burning up computers? Or any ideas how to stop the misfire. Dealer did timing about 3,000 mi ago I’ve replaced cats and o2 sensors as well. Compression is good.

What makes this problem better or worse?

Same

How long has your 2009 Chevrolet Traverse had this problem?

Almost a year cannot drive it like it is