Genuine GM 4.3L PCV Valve Grommet Seal - Chevy Astro Blazer S10 Silverado

It's a tiny piece of rubber, but if it's cracked, your 4.3L Vortec is sucking unmetered air and running like garbage.

This is a genuine GM PCV valve grommet seal.

OE spec, direct replacement.

Fits a ton of Chevys with the 4.3—Astro, Blazer, C/K trucks, S10, Silverado.

If you're swapping the PCV valve, you should absolutely do the grommet too.

They get hard and leak.

Part number 4006.

It's brand new, genuine OEM, not some aftermarket crap.

Rubber is fresh and flexible.

Get your PCV system sealed up tight and keep that idle smooth.