My 01 and 04 Trailblazers each have chronic loose chains. The cam is not turning in the housing but I can't believe that the chains stretch that much. The 01 has a new chain with less than 10hrs on it. Any suggestions?

 

hard to belive that too umm u did untighten all the bolts right???? just a thought

 

Yeah. I got all the bolts tight, even the caliper bolts. I marked the cam and the housing to see if it was turning but it ain't.