[Joe67]

Originally Posted by Cdshinne

I have a 2000 z71 5.3 that ticks every morning when i start it up! I have just changed the oil thinking that might help but the sob still ticks on a cold start. The truck runs great but i was wondering if this could cause more problems down the road? Should i fix it or just let it go?

More than likely 'pistion slap' or 'cold start knock'.
My 2000 5.3l GMC has done it from day one, over 210K later zero issues. I have yet to see any motor that has seen any type of damage/failure related to it. Some truck owners had their motors replaced by GM while it was covered under warranty, but I believe those were few and far between.

It is annoying and there is no real remedy (filters, oil, etc)