Can the brake booster cause the brake pedal to go to the floor? Also when the engine is turned on, a hissing noise comes from the booster especially when the brake pedal
![1997 - 2000 GM OBS Truck Loud Hissing Air Sound ~ Brake Vacuum Booster Replacement (Chevy & GMC) - YouTube 1997 - 2000 GM OBS Truck Loud Hissing Air Sound ~ Brake Vacuum Booster Replacement (Chevy & GMC) - YouTube](https://i.ytimg.com/vi/xUg1bXuxQmA/sddefault.jpg)
1997 - 2000 GM OBS Truck Loud Hissing Air Sound ~ Brake Vacuum Booster Replacement (Chevy & GMC) - YouTube
![My brakes is making a hissing sound (like air coming free) when I brake but it isn't affecting the brakes, what could it be? Could it be a leak maybe? : r/Cartalk My brakes is making a hissing sound (like air coming free) when I brake but it isn't affecting the brakes, what could it be? Could it be a leak maybe? : r/Cartalk](https://preview.redd.it/6z6dnd7n8j141.jpg?auto=webp&s=c46c6ba65c03943e21c511aa72916a59ca256259)
My brakes is making a hissing sound (like air coming free) when I brake but it isn't affecting the brakes, what could it be? Could it be a leak maybe? : r/Cartalk
When I press the brakes in a car, there is a sort of hissing, almost compressed air sound coming from the brake pedal. What causes that? - Quora
![Soft brake pedal and air noise - Buick Reatta - Antique Automobile Club of America - Discussion Forums Soft brake pedal and air noise - Buick Reatta - Antique Automobile Club of America - Discussion Forums](https://content.invisioncic.com/r277599/monthly_2019_12/1819165851_unnamed(1).thumb.jpg.073267cfa450ade2cc76b4f23dcb4132.jpg)