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Hissing near brake pedal?

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Old Jun 30, 2020 | 08:57 PM
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Maddie Leslie Stoddard's Avatar
Maddie Leslie Stoddard
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From: oklahoma`
Hissing near brake pedal?
Hissing near pedal when not pressing the brake
im assuming this would be the brake booster? If so how do i get the fuse box out of the way to replace the brake booster?
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Old Jun 30, 2020 | 09:29 PM
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RJ_RS_SS_350
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From: California
Check the plastic fitting for the vacuum line to the booster, that is the weak link.
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Old Jul 1, 2020 | 12:13 AM
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Maddie Leslie Stoddard
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From: oklahoma`
i already did, no bueno, im thinking it's a diaphragm leak from the booster itself
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Old Jul 1, 2020 | 07:31 AM
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Oldblue
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Welcome to the site, here’s a detailed how to

https://www.chevyhhr.net/forums/www....ad.php?t=59520
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Old Jul 1, 2020 | 09:55 AM
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Cat Man HHR
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Here's a video to help.
Once the top part is off I would guess pretty straight forward to remove the bottom part.
I myself have not done this.

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Old Jul 1, 2020 | 12:11 PM
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Another video to replace master cylinder

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Old Jul 1, 2020 | 04:38 PM
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RJ_RS_SS_350
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Originally Posted by Oldblue
Another video to replace master cylinder

https://youtu.be/uOavSVzMRpU
He's not replacing the booster, but there should be enough information there. Guy talks too much, and he is not great with the camera. But it should do.
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Old Jul 1, 2020 | 05:23 PM
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At least he gets the master cylinder outta the way
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