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ss3011 · 03-26-2017, 04:02 PM

If you Google GM lifter/valvetrain noise there are a lot of "fixes" . Most involve pouring some type of product into the oil to clean crud out of the lifters . Seafoam comes to mind , or Marvel Mystery Oil . Worth a try before getting inside the engine .

03-26-2017, 04:02 PM	#8
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: 5.3 LS Top End Noise If you Google GM lifter/valvetrain noise there are a lot of "fixes" . Most involve pouring some type of product into the oil to clean crud out of the lifters . Seafoam comes to mind , or Marvel Mystery Oil . Worth a try before getting inside the engine .