My timing chain went on my "09" traverse @ 100,000 miles I decided to take on the job even though I have not done one for 10 plus years . I pulled the engine replace some valves that were bent on the right side put head back on put on the timing chains . So I rotated it few times to make sure everything was good but I had slack in the right bank chains. I don't know if this is normal or if something else is wrong .. Please help I hate to put back in and still have a broke down car ??? Thanks