Hey guys, the 4.3 in my silverado has developed a ticking sound, a little louder on passenger side, of the engine. Sounds like lifters or valves. Its not loud. Cant hear in the truck. Just enough to be annoying to me when i listen. Always have done 3K mile oci's and used mostly gtx. The tcking has gotten a little louder, so i changed the gtx out and put in Mobil 1 5w30 w/ napa gold. anybody else have anoying ticking sounds from their chevys? Should I just ignore it?