Sounds like my truck w/ Edge Evo. I seem to notice it when its somewhat warmed up, I think.
Ive noticed it on lvl 4 and now on lvl 1. Was wondering if it was a normal noise, after all it sounds like a diesel, just doesnt do it all the time. Ive not had the truck for a warm season, or summer fuel yet so I have no comparison there.
04.5 4x4 ~160k miles
DE 4", 5100s, LBZ MP, S&B LBZ air, KoryWillis Go-go Juice, Insight CTS, ADII, 8' Fisher, Highroller Ultimate Idler Arm, Profab delete, XD RareParts tie rods
Dirtymax this, Dirtymax that... :taunt