Brake pedal going to the floor - The 1947 - Present Chevrolet & GMC Truck Message Board Network

powerT · 05-17-2012, 06:25 PM

Brake pedal is going to the floor , it not touching the floor but it feels likes its going to . The brakes still stop , is the normal for these trucks or is the master cylinder or booster going bad ?
How can you tell if its the booster or master cylinder?
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J Knight · 05-17-2012, 07:57 PM

Sounds like your master cylinder is going bad, if so you may see some brake fluid leaking where.it mounts to the brake booster. You may also want to check all brake lines, calipers and wheel cylinders for leaks. When the booster goes bad the petal is hard to push like when the engine is turned off.
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coltonk · 05-17-2012, 08:38 PM

Did you just recently replace brakes?

Goldfinger · 05-17-2012, 08:42 PM

Make sure they are bled. if not worn pads/shoes. then check the master cylinder. I think there are 2 chambered so if you were on 1 and it fails it could cause this.

powerT · 05-17-2012, 08:53 PM

Yes i put new brakes and rotors on , tried to bleed but one of the bleeders is broke off
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84_chevy · 05-18-2012, 01:34 AM

you need to replace the bleeder or get a new caliper, once you bleed the lines I'm sure your problem will disappear.

05-17-2012, 06:25 PM	#1
powerT Registered User Join Date: May 2011 Location: Tennessee Posts: 68	Brake pedal going to the floor Brake pedal is going to the floor , it not touching the floor but it feels likes its going to . The brakes still stop , is the normal for these trucks or is the master cylinder or booster going bad ? How can you tell if its the booster or master cylinder? Posted via Mobile Device

05-17-2012, 07:57 PM	#2
J Knight Registered User Join Date: Jun 2011 Location: Baytown TX Posts: 2,219	Re: Brake pedal going to the floor Sounds like your master cylinder is going bad, if so you may see some brake fluid leaking where.it mounts to the brake booster. You may also want to check all brake lines, calipers and wheel cylinders for leaks. When the booster goes bad the petal is hard to push like when the engine is turned off. Posted via Mobile Device __________________ John 82 Chevy Silverado 350ci/TH350

05-17-2012, 08:38 PM	#3
coltonk Registered User Join Date: Mar 2012 Location: Oklahoma City Posts: 74	Re: Brake pedal going to the floor Did you just recently replace brakes? __________________ "How does a posi-trac work on a Plymouth?.. it just does!"

05-17-2012, 08:42 PM	#4
Goldfinger Registered User Join Date: May 2010 Location: laurel hill Fl Posts: 645	Re: Brake pedal going to the floor Make sure they are bled. if not worn pads/shoes. then check the master cylinder. I think there are 2 chambered so if you were on 1 and it fails it could cause this. __________________ 1985 C10 Custom Deluxe LWB 305/700r4 [ Goldfinger ] 1999 k3500 crew cab dually 6.5tdi/4l80e

05-17-2012, 08:53 PM	#5
powerT Registered User Join Date: May 2011 Location: Tennessee Posts: 68	Re: Brake pedal going to the floor Yes i put new brakes and rotors on , tried to bleed but one of the bleeders is broke off Posted via Mobile Device

05-18-2012, 01:34 AM	#6
84_chevy Registered User Join Date: Aug 2009 Location: Toronto, Ontario Posts: 111	Re: Brake pedal going to the floor you need to replace the bleeder or get a new caliper, once you bleed the lines I'm sure your problem will disappear.

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