2000 Chevy Silverado lifters

Hi there,

This will be a faulty hydraulic lifter, when left for extended periods they can bleed down and when engine started they rattle as they have no oil pressure, sometime they fail due to a sticky interval valve or just gum up. There are a fer additive that can help clean then out, but the only real solution is to replace them and run the engine up to operating temp on a regular basis, this will keep th oil up to them.

Mark (mhpautos)