Ok i have 2000 suburban 5.3 vortec first year for this engine.i notice when pulling the dipstick out.i have a small amount of vaccum is it spouse to do that?

 

I have never bothered to see if you get a vacuum draw through the dip stick hole but I suppose you would, after all that is what the PCV is doing, ventilating the crank case...

 

Alright thank's that take care 1 problem.reason i ask is because i have little blue smoke.after long idle like 5 min's when i revv it.but after the smoke goes away.have did compression test there all good 165 psi all 8.

 

Probably valve seals.

 

Thank you people glad to find out it nothing to bad.because tbh with yall i got 13000 into when i'm done with the brake line fuel line