I have a 2009 Yukon with a 6.0L LFA engine. I changed out the timing chain. When I went to put the phaser back on I guess I overtightened it and now it just spins. Do I have to replace the cam now?
I honestly don't know, not a lot of hybrids get worked on by the owners and I've never personally replaced a timing chain on a ls with a phaser.
you might try in the main engine/driveline section, more eyes there. but if you remove the bolt and look at the threads, you can usually see which ones are damaged, either the bolt or the hole. if you need it, I can probably look up the bolt tq for you. I guess it might be possible you stripped the bolt and not the cam, but impossible to know without seeing it.
