I was able to find the part number for the bolts to the tensioner but I can not locate the bolt for the idler pullery. Any help would be nice. Part number or website I can order it from. Also is there any site that sells some sort of vacuum plugs for the intake manifold. Thank you

 

Vacuum plugs can be purchased at auto zone or advance auto parts. The same stores should be able to get the parts you requested or atleast order them. If not, google GM oem parts suppliers and you should be able to find them that way.