CHEVROLET CAMSHAFT LIFTER NOISE

Engine Was Running Good, And All Of Sudden It Begin To Miss Real Bad And Bad Noise Which Sound Like Lifters.I Took Covers Off And About 50...

My 99 Suburban With Only 54,000 Miles Lifters Just Started Clattering. Isn't There An Additive To Keep Them Pumped When Not In Use. So Far...