Gmc yukon knocking noise
Hi
I have a 2008 gmc yukon 5.3L with afm. The lifters went
bad so I thought might as well change them all. Now I hear
lifter noise from one side of the engine. The oil pump along
with the pick up tube and pressure relief valve in the oil pan,
oil pressure sensor along with the small filter under it been
changed earlier. So I thought let me try changing the push
rods did that and the issue still there. So what could be the
problem. My knowledge is not much I hope someone with
more knowledge help. Thanks in advance