4.8 ls ticking noise help

[72blu]

Have you got good oil pressure?

There is an O-ring on the oil pickup tube that often goes bad on these engines. A bad O-ring will allow air into the oil system causing the oil to perforate. The perforated oil won't properly lubricate the lifters causing a ticking sound. This happened to me and once I replaced the O-ring my oil pressure came back up and the engine no longer ticked.