I have a 1997 GMC Sierra pickup that hisses when I depress the brake pedal. It sounds like the sounds is coming from under the dash and the pedal sometimes is hard to depress. What might be causing this?
I have a 1997 GMC Sierra pickup that hisses when I depress the brake pedal. It sounds like the sounds is coming from under the dash and the pedal sometimes is hard to depress. What might be causing this?