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Soft brake pedal, after replacing front brake hoses?

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Soft brake pedal, after replacing front brake hoses?

Postby jamoka3 [OP] » Mar 30 2015, 4:58am

I have a 05 Silverado, which has front disc and rear drums. I had to change my front brake hoses, due to age and wear. So I also replaced the front rotor s and pads. I then had my wife help me pump the brake pedal 5-6 times and then hold, ( open bleeders on d/s rear, then p/s front then d/s front, till fluid came out clearly). After doing this a few times I took the truck for a break in procedure that was recommend by the brake pad manufacturer.
After all this the pedal still feels soft to me...did I do something wrong? Or forget a procedure to getting all the air out?
Current rides:
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Re: Soft brake pedal, after replacing front brake hoses?

Postby ASTE25 » Mar 31 2015, 5:56am

Did you get them heated up good and broke in? New brake pads will sometimes make the pedal feel slightly softer.
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Re: Soft brake pedal, after replacing front brake hoses?

Postby scanaego » Mar 31 2015, 6:14am

I had same problem with a older Silverado. Try removing the fuse for the ABS and see if this improves the situation. If your brakes feel fine without the ABS then you will at least know it is not the hydraulics.
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Re: Soft brake pedal, after replacing front brake hoses?

Postby Vicarod » Mar 31 2015, 10:39am

Did you bleed the p/s rear?

Might have to look into bleeding the ABS module as well. I don't know about the 2005's, but on mine that needs to be done for a proper bleed.
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Re: Soft brake pedal, after replacing front brake hoses?

Postby BigCountry2022 » Mar 31 2015, 1:11pm

Try using a scan tool (not an OBDII reader) to cycle the system, ir you can try forcing and ABS stop.

Had the same issue after Chevy did my front brakes. Forced an ABS stop and the pedal was firm again.


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Re: Soft brake pedal, after replacing front brake hoses?

Postby jamoka3 [OP] » Mar 31 2015, 6:11pm

So you think activating the abs , by maybe locking up on some dirt? Then 're-bleed the system; should help improve the pedal feel?
I worked the pads and rotors in as required by the manufacturer. I did a 40-5 mph stop five times (aggressive) then a 25-5 mph stop five times(moderate).
Current rides:
2016 Chevy 1500 Z71 LT 5.3L 6speed 3.42 gearing.
2014 BMW 328i w/xdrive, AA8 ECU modded.( weekend / track car)
Past rides:
2005 Silverado Z71, 5.3L 4X4 (Traded in for the 2016.)
1978 Chevy Nova, 2 door, (Chevy 383 w/ B&M turbo 400.)
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Re: Soft brake pedal, after replacing front brake hoses?

Postby scanaego » Mar 31 2015, 6:20pm

Big Country`s idea is known to work at times. I would suggest to try it. But after that simply remove fuse for ABS and test brakes this will hopefully indicate what type of problem your dealing with.
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Re: Soft brake pedal, after replacing front brake hoses?

Postby scanaego » Apr 05 2015, 9:25am

Any luck? Whats the verdict?
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Re: Soft brake pedal, after replacing front brake hoses?

Postby jamoka3 [OP] » Apr 05 2015, 7:41pm

I haven't really dug into it yet, been driving my other ride for the past week. I'm probably gonna invest in a mityvac vacuum bleeder, and do the entire system a few times. I drove the truck this weekend, it's drivable it's just the brake pedal is a little soft, just like there's air in the system...
Current rides:
2016 Chevy 1500 Z71 LT 5.3L 6speed 3.42 gearing.
2014 BMW 328i w/xdrive, AA8 ECU modded.( weekend / track car)
Past rides:
2005 Silverado Z71, 5.3L 4X4 (Traded in for the 2016.)
1978 Chevy Nova, 2 door, (Chevy 383 w/ B&M turbo 400.)
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Joined: Dec 17 2011, 9:12pm
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Location: New Jersey
Year: 2016
Make/Model: Chevrolet Silverado
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Extra Info: Z71 5.3L 4x4
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Re: Soft brake pedal, after replacing front brake hoses?

Postby nealinator » Apr 05 2015, 8:13pm

I agree with the other poster that all brakes need to be bled starting with farthest from the master cylinder to the closest. I presume maybe you just left off that you bled both of the rear brakes before moving to the front. If not, start over and do them all.

Where did the new brake lines come from? Were they OEM or aftermarket?

Did you use the correct DOT fluid for your vehicle according to the manual?

Just a few thoughts.
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