A vacuum booster is the big black canister that the master cylinder connects too.A hydro boost assisted brake unit is very small and has connections to the power steering pump and power steering box.
Piston slap was common when cold with the earlier engines , and harmless too. The slap noise quiets down a bit when hot.
Was the oil really dirty when it was drained ?
These LS engines take lot's of abuse and neglect and keep on running.
Welcome !
I'd start with the basic's, putting a known good mechanical gauge on the engine. Then a good oil and filter change. How many miles are on the engine ?
Welcome , Make yourself at home. Post up some pic's of that bad boy.
I have a few questions about the brake system on the newer PPV Tahoe's if you don't mind.
The resonation is one of the reasons that a Magnaflow isn't a good choice for a upgrade exhaust system. Little to no power increase is another reason.
Did you feel any power loss with the Walker ?
Corsa sport system is louder than Corsa touring system. Corsa touring is a quiet exhaust system. All Corsa systems are top quality.Magnaflow has some resonation and is also built very well . Like with a woman , everyone's choice may differ on what exhaust system they prefer.
Performance wise ...
http://www.mikenorrismotorsports.com/Billet_PCV_Catch_Cans.html
Check EBay also. Much cheaper and they all do the some thing. Some are fancier than others.
VICDBOSS same on the 15's.
I'd get a good tune on it first. If that don't satisfy your itch ....... Magnacharger TVS supercharger , headers and a Corsa exhaust. That should put a smile on your face.
Best of luck !
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