5.3 engine tick sound!!!

i got an 02 avalanche it has always been run on 5w30 synthetic motor oil n i noticed a really faint ticking sound like it might be the valves...i was wondering if there would be any problems switching back to conventional oil to see if that fixes my problem...any suggestions? i heard the slight ticking is common on the 5.3

thanks for 3 posts in case someone didn't see the others