fwi
Well-Known Member
My 04 Avalanche 5.3L engine has developed a ticking noise upon cold start up, it goes away within 15 seconds or so. Noticed this yesterday morning in Mojave CA where the temp was about 60 and it has done this a couple of times in the past month or so when I have been in cold areas. Oil/filter service has been done every 3K miles since new, now has 174K miles.
Anyone recommend Marvel Mystery Oil or Seafoam which I have been reading about, or is there another problem/solution?
Anyone recommend Marvel Mystery Oil or Seafoam which I have been reading about, or is there another problem/solution?















