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Put all in brakes on and got a soft pedal

Discussion in 'Chevy Trucks' started by dheavychevy38, Jan 6, 2010.

  1. dheavychevy38

    dheavychevy38 Senior Member
    Messages: 283

    It's on the 03 chevy 2500 hd I just put all new calipers and pads and rotors on and can't seem to get it to bleed out all the way. Any ideas?
     
  2. CityGuy

    CityGuy PlowSite Fanatic
    Messages: 16,984

    try opening all bleed out when on level ground. make sure master is full and let sit for a while and check master to make sure it remains full. After time gravity will take it's course. close bleed out when you have a constant flow.
     
  3. NCat496

    NCat496 Senior Member
    Messages: 353

    Make sure your new calipers arent upside down. Happened to me and its very easy to do.
     
  4. dheavychevy38

    dheavychevy38 Senior Member
    Messages: 283

    No there not lol
     
  5. lilweeds

    lilweeds PlowSite.com Addict
    Messages: 1,178

    If any air gets trapped in the ABS unit you will need the dealers Tech2 to get the air out, nearly impossible without it.
     
  6. ConnorExum

    ConnorExum Senior Member
    Messages: 282

    Isn't the ABS unit just a sensor that monitors wheel slippage and thus overrides the pedal command?
     
  7. thesnowman269

    thesnowman269 Senior Member
    Messages: 951

    nope. Its actually a moduale that the break fluid flows through alowing it to "pulsate" causing the pulsating breakage that is ABS
     
    Last edited: Jan 6, 2010
  8. ConnorExum

    ConnorExum Senior Member
    Messages: 282

    Really, never knew that that. I figured it was a type of sensor that just simply inerrupted the control of the break pedal when wheel slippage was detected.
     
  9. thesnowman269

    thesnowman269 Senior Member
    Messages: 951

    Yup. There are brake bleeders that pump the break fluid through the caliper up to the master cylinder. This will deffinatly eliminate all air in your lines and entire brake system if you are still having problems. Although like previously mentioned Letting the fluid flow for a couple minutes will do the trick but if that doesnt work You may want to look into one. Ill try and find the name of the company that makes it for you
     
    Last edited: Jan 6, 2010
  10. thesnowman269

    thesnowman269 Senior Member
    Messages: 951

  11. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Did you allow the system to run dry while swapping the calipers?

    Do the bleeding with the pedal and the truck running as that is the most effective way to remove the air without commanding the ABS unit with a scanner. Which is really the proper and most effective way if you allowed a great deal of air to enter.

    Don't waste your time or fluid on gravity bleeding. It isn't effective on these later model trucks.
     
  12. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    and dont forget always start at the longest run from the master first.

    on your truck its going to be right rear/left rear/right front/left front.
     
  13. mossman381

    mossman381 2000 Club Member
    Messages: 2,410

    You might want to try opening the bleeder screw then push the brakes, close the bleeder screw while you are holding the brakes. Do this a few times to get the fluid in the system. Make sure you check the master cylinder because this moves alot of fluid and you don't want to run it empty.
     
  14. dheavychevy38

    dheavychevy38 Senior Member
    Messages: 283

    No the system never went dry didn;t give a chance to. I will have to try it with the truck running. Thanks for the info guys. After some sleep I will check it out.
     
  15. stacks04

    stacks04 Senior Member
    from ct
    Messages: 119

    gravity bleeding will work on these trucks, just not really effective when doing a major system overhaul like was performed here. if the truck never ran the master dry the abs unit should be fine, just continue to bleed starting with the rr, lr, rf, lf. should do you fine.
     
  16. KSikkema

    KSikkema Senior Member
    Messages: 179

    have run into several problems such as that on similar model years. had to hook up a pressure and vaccum bleeder here in the shop to fix.
     
  17. RichG53

    RichG53 PlowSite.com Addict
    Messages: 1,135

    Is reverse bleeding a good Idea ???? I guess I have my doubts...
     
  18. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Only if you flush the system first with a pressure bleed in the normal direction first. Otherwise all contaminates that generally settle to the lowest point in the system (such as the calipers) get forced back through some very expensive brake system components. Such as the ABS unit. Not good.
     
  19. RichG53

    RichG53 PlowSite.com Addict
    Messages: 1,135

    Those were my thoughts but just wanted to clarify things ...
    Is it necessary to do a total flush at any time ??? Or just leave well enough a loan.??
    Thanks!!
     
  20. stacks04

    stacks04 Senior Member
    from ct
    Messages: 119

    i got a spare cap and added a plastic vacuum type fitting to it through a hole i drilled in it. it works mint for sealing the system and putting my vacuum/pressure pump to it to force fluid through the system after you open the valves.