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No power steering or brakes

Discussion in 'Truck & Equipment Repair' started by GONZO911, Feb 1, 2016.

  1. GONZO911

    GONZO911 Member
    Messages: 41

    I have a 2002 GMC Sierra, 2500 HD with plow prep package. The truck has a Western 8' Pro Plow Unimount mounted on the truck, has been on there since it was purchased new. The truck has ballast of 1300 pounds in the rear, over the rear axle.

    When pulling up to a building and stopping, then backing up and turning the power assist for the brakes and steering stops working. Also happens when turning left and slowing with foot on the brake.

    History of repairs- steering gear Dec 2014. The power steering pump was replaced last week. Still does this. Noted that if the engine is running faster than idle it won't be as bad.

    Anyone have ha this problem?purplebou?
  2. snowman55

    snowman55 PlowSite.com Addict
    Messages: 1,071

    Power steer pump.. Sucks have to bleed those perfect and have clean fluid in entire system or you will burn up a new 1 right away. I have 2 full time certified mechanics and we send this job in.
  3. Philbilly2

    Philbilly2 2000 Club Member
    Messages: 2,193

    Good old hydroboost... gets you every time...
  4. hosenfeffer

    hosenfeffer Senior Member
    from nh
    Messages: 119

    Had brake issue after power steering pump replaced on 2002 Gmc hd did a number of lock to lock wheel turns over a few days and problem has gone away so far. Did it while slowly driving since I believe it is not great for ball joints?

    PS next time some one besides me is playing with ancient #$$%%^^ fragile lines.
  5. Randall Ave

    Randall Ave PlowSite.com Addict
    Messages: 1,434

    When you replace the pump you should flush the system. Trying to not let the pump cavitate.
  6. Whiffyspark

    Whiffyspark 2000 Club Member
    from SOMD
    Messages: 2,402

    You can pressure bleed the pump as well
  7. MXZ1983

    MXZ1983 Senior Member
    Messages: 210

    X2. Hydroboost, replace the complete master cylinder.
  8. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,179

    Have you checked the belt tensioner?
  9. dheavychevy38

    dheavychevy38 Senior Member
    Messages: 283

    Jack front of truck up and cycle wheel lock to lock many times at idle. Every once in a while pump the brake pedal. This will bleed the system while not puting stress on it. Problem when u try to bleed it with wheels on the ground causes to much pressure and cavitates the pump allowing air in the system and locking it up..
  10. GONZO911

    GONZO911 Member
    Messages: 41

    Thanks for all the replies. One thing of note-if the engine speed is raised slightly the problem isn't there. We are a repair shop, have tried most of these and checked pretty closely. Possibly thinking related to weight. He's carrying a skid of salt bags in bed of truck. We want him to move the skid back towards the tail gate. Also having him boost pressure in front tires a bit. Will advise as things progress.

    Think snow! Can't believe that the last two "Major storms" dropped less than a inch of snow.