Engine rattle

Backwoods16

Original poster
Member
Aug 14, 2012
21
Have a rattle/clank coming from engine behind the throttle body. I changed my serpentine belt, idler pulley and tensioner and the noise is still there. 130k miles on a 07 envoy. Appears noise is the same from both aides of the engine. Any idea what this is? Not overly loud but just started happening.
 

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