My booster is now making a hissing noise

Tiny
LAMARTHOLLMAN
  • MEMBER
  • 2006 GMC ENVOY
  • 202,120 MILES
Just replaced from end pads and rotors both sides. My booster is now making a hissing noise
Sunday, April 22nd, 2018 AT 5:53 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Yeah, normally the hissing is a leaking diaphragm so you could rebuild it but it is easier and normally just as cheap to replace it.

Below is the process from the manual on how to replace this. Please let us know if you have questions with this.

Thanks
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Friday, April 9th, 2021 AT 7:51 PM

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