RATTLE on 2005 GMC Envoy

i HAVE A RATTLE WHEN THE AIR COMES ON CHANGED THE IDLER TENSIONER AND REPLACED THE WATER PUMP CAUSE A FREIND HAD 2005 ENVOY HIS RATTLE LIKE THIS SAID IT WAS PUMP.WHAT DO YOU THINK IT MIGHT BE?DO YOU THINK WHAT I HEAR MIGHT BE THE A/C CLUCTH?

Asked by for the 2005 GMC Envoy
1 answer 2 comments
yes it could be a comp clutch does the noise go away when you remove the belt?
yes I think it dose it will queiten down when I push down on the belt tensioner
did you replace the belt when you changed the tensionr