2004 Gmc Sierra Brake Pedal Goes To Floor

Added front pads and pushed pucks back then went soggy on the pedal.

2004 gmc sierra brake pedal goes to floor.

If no pressure builds up when pumping maybe wheel cylinder or caliper. The abs kicked in then the pedal dropped to the floor. Truck brakes were fine. Pedal takes substantial travel to stop the truck.

Technically there are two main causes that would make the brake pedal sink all the way to the floor. Took 100 feet to stop at 35 mph. Rear system is in check and adjusted properly. With truck running pump the brake pedal several times and hold pressure on pedal after third pump.

Was in a panic stop. The final reason for a brake pedal to go to the floor is failing axle bearing. Do not let the reservoir go empty. If this bearing goes bad it will allow the brake rotor it move back and fourth which pushes the caliper piston back into the caliper creating an air gap.

Axle bearings hold the brake rotor true without play while they both rotate. Pedal offers some resistance but can be forced to the floor. 2000 gmc sierra 5 3 vacuum booster i just had the same thing. Does the pedal go to the floor with pressure on the pedal if so master cylinder.

I stopped just inches from the other car. I took the truck on a 30 minute drive the other day and on the way back home my brake light came on and the pedal goes almost to the floor. Pedal has remained at the floor. I can still stop.

If you still have a low pedal clamp off the 3 flex lines and see if the pedal gets better. Pumping does not bring it up. System was only bled after the soggy pedal was found. It s important to not pump the pedal when doing the one part of the bleeding.

I looked all around the truck for leaks from brake fluid there is none and the brake resiviour sorry for the spelling is still full. One of the reasons is the brake system loses pressure from an external brake fluid leak. 1 leak from brake line or brake caliper. If the pedal is hard to push then maybe booster.

Bleed the rest of the system starting at the right rear and move to the left rear then right front and finally left front.