runs rough engine light on code ten and 11 on reader

What is your question?

took it to a shop and had it read he said code ten and 11 came up and said i need a new timeing chain i dont believe him any thoughts worked fine then eng light came on and runs like its missing

What makes this problem better or worse?

nothing

How long has your 2009 Pontiac G5 had this problem?

few weeks