opeg1979

@dna9656 thanks for the reply. I was hesitant on that being the issue because a friend just did this and it did not fix the sound in his 5.3, but I will check out your posts!

5.3 NON AFM with the like 210k I know this is issue is common and probably on here a ton, but I am just not sure what this issue is and I thought I would see if anyone as had this specific case. Had a knock sensor code a month or so ago but it went away on its own. What is happening is every time I drive the truck it goes though this cycle where it ticks. Idling, driving i hear it. Seems to happen faster when sitting still. Then all of a sudden it goes way. Oil pressure is ok, i have tried thicker oil, motor flush twice. I thought it was oil pickup tube problem, but the pressure is good and i had another truck with that issue and it was not the same. I figured its a stuck lifter but if that were the case why does it stop and start again? Just wanted to get some opinions before tear it down. That is the one things that baffles me is that is stops, and it can start anytime, cold or hot. It does seem better for a while after a fresh oil change. How bad is running it with that tick long term? Thanks,

Last year I tried the MBRP cat back kit that said it was designed with GM AFM motors in mind. I put it on and I could not take the drone after 3 weeks. It sounded good on acceleration but cruising there was definitely a drone. So I took if off. This year i decided I would try something different, I wanted a less aggressive sound. I build my own cat back kit using the stock pipe up to a Flowmaster Super 50 and then the 3" Dynamax 54704 pipe without the resonator. I like this setup, deep mild tone with some power, and almost silent at cruising speeds.