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95 S_Trucker · 05-12-2018, 08:59 PM

It sounds like there is a hole in your vacuum booster. Check to see if your master cylinder is leaking at the rear. That's the biggest cause of a leaking booster.

05-12-2018, 08:59 PM	#2
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: 2003 Tahoe Service Brake Booster? It sounds like there is a hole in your vacuum booster. Check to see if your master cylinder is leaking at the rear. That's the biggest cause of a leaking booster.