Engine knock

[Moesyukon]

I have a 2008 GMC Yukon XL with 220,000 miles.  It runs great except that I  hear knocking when driving or idling.   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 have been changed. I’ve tried various different oils and it doesn’t stop.  Can’t figure it out.  I hope someone can help. 
 

thank you. 

[Jsdirt]

Might be engine time. Sounds like the big end bearings are all worn out. Our '86 Grand Marquis does this only when first started, or if it's super hot outside - 274k miles on that one.