My 6.2 in my 08 Yukon Denali sounds different than the old 2002 5.3 I know. I can't tell if its making a bad or normal noise. A Mr wolftrk69 casted his vote already.

Let's play a game. What do y'all think it is if anything. Kind of a rhythmic grind/rumble noise.

As instructed I will pull the belt this weekend to see if it goes away. If not I'll use mech stethoscope to pinpoint.

Here is the vid. Place your bets!!

http://youtu.be/TdW-eGqctMs

https://youtu.be/TdW-eGqctMs

 

Made the links clickable

https://www.youtube.com/watch?v=TdW-...ature=youtu.be

https://www.youtube.com/watch?v=TdW-...ature=youtu.be

 

Idler pulley bearing is my guess

 

Idler pulley and both tensioners had crunchy bearings. The engine is a bit quieter now. Still makes noises my gen 3 5.3 never made, but I should expect that.