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9/22/2017 12:11:25 AM
Posted: 9/7/2005 5:28:44 AM EDT

This started yesterday. 1994 GMC c/k (Sierra). When I start the vehicle with my foot on the brake (like you are supposed to), a big vacuum sound comes from where the brake petal goes into the firewall. On the way to work this morning, I had to nearly put it to the floor before the brakes reacted to slow down on the freeway.

Booster going bad? Why would the whooshing sound be coming from the floorboard?
Link Posted: 9/7/2005 5:30:41 AM EDT
Sounds like a problem with the booster.
Link Posted: 9/7/2005 5:36:21 AM EDT
[Last Edit: 9/7/2005 5:39:32 AM EDT by Rocky9_5]
yep, brake booster is leaking. Its located on the firewall just outside the cab.
Link Posted: 9/7/2005 6:02:28 AM EDT

any hope of a fix, or will I have to buy a new one?
Link Posted: 9/7/2005 7:29:48 AM EDT
The only thing you can do is ckeck for vacuum leaks under the hood. If the booster is bad it needs to be replaced.
Link Posted: 9/8/2005 10:25:56 AM EDT

Originally Posted By Roadhawk:
Sounds like a problem with the booster.




+1
Link Posted: 9/11/2005 10:08:15 PM EDT

Originally Posted By 3rdStreet:

Originally Posted By Roadhawk:
Sounds like a problem with the booster.




+1



+2
Same thing happend with my Corvette. Pretty easy to change them out.
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