My booster is now making a hissing noise

2006 GMC ENVOY
202,120 MILES
Avatar
LAMARTHOLLMAN
  • MEMBER
  • 1 POST
Just replaced from end pads and rotors both sides. My booster is now making a hissing noise
Apr 22, 2018 at 5:53 AM
Advertisement
Avatar
KASEKENNY
  • ✓ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
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
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Apr 9, 2021 at 7:51 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.