It depends on what kind of car you have. Try taking the pedal off and lubing the pivot and where the push rod mounts.
It needs to be lubricated where the pedal hangs off of the pivot point.
The brake pedal has a hinge or pivot pin, give it a shot of lubricant,should stop squeaking.
dry brake shoe/pad operating arm on rear brakes
manualy lift brake pedal to see if they go out. if so check spring at pedal
Pressure is released from the hydraulic system and brake pistons relax.
Push the brake pedal to released.
Why do brake pads squeak after replacing pads?
Look under dash near brake pedal assembly for a damaged wire grounding when pedal is released. Repair and tape it out of the way.
Breaks will often squeak when they are wet, such as after a heavy rain, on a humid day, or on a foggy morning. The water prevents the pads from properly grabbing the rotors. This causes the squealing noise.
(Harmony2k3) If you have the following issues then I would have them checked: (do they squeak every time they are wet? do they squeak at all when they are dry? when you push your brake pedal is it spongy and go to the floor? do you have to pump your brakes? has it been more than a year since you've had brake service?) If you said yes to any or all of those questions then I would have them looked at.
no
When Exhaust brake is on squeak noise comes from the engine?"