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When I apply the brake the steering lockup,without braking it steers fine. Is this the power steering pump failure?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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alpha4
  • 42 Answers

SOURCE: Shake in steering wheel

I believe you need your disk brake rotors turned to be true again or have them replaced. Whe you use your brakes a lot and kit puddles of cold water then it will warp the rotors which will cause the violent shaking. You may not feel it in the brake pedal even if it is warped rotors. If you don't think you have warped rotors then you should be very careful driving it because it will probably be in the steering sector arm or the idler arm on the steering shaft.
Dale

Posted on Jan 04, 2009

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  • 14036 Answers

SOURCE: 1996 GMC Suburban Brake and Power Steering Failure

if you got the hydro brake boost system .check your power steering pump hoses for leaks .check master cylinder is leaking. fill power steering pump and master cylinder with fluid. the one that is the lowest that the one leaking. if your hydro boost brake unit is leaking .replace it .if power steering pump leaking. it not the hoses replace it . because if power steering goes out brakes will also go out.

Posted on Apr 30, 2009

  • 42 Answers

SOURCE: Knocking on steering / braking

Sway bar links are also part of the suspension that you really can't feel while driving. If you're handy enough take your front wheel off and you'll see a bar passing through to each side of your front suspension. It is connected to the lower control arm by sway bar links. The links have ball joints enclosed by rubber boots with grease. Eventually this grease will come out or the boots will tear and you'll hear metal on metal while force is applied. These are fairly cheap to buy yet you may have some trouble getting them off without air tools. If you try to do it your self i'd suggest spraying the bolts down with some lubrication.

Posted on Jan 06, 2010

  • 14036 Answers

SOURCE: My ABS/brake light came on after warming up. I

YOUR VECHICLE HAS THE HYDRALIC BOOSTER.WHICH YOU POWER STEERING PUMP CONTROL BRAKING SYSTEM.CHECK POWER STEERING PUMP FLIUD LEVEL.IF LOW CHECK POWER STEERING PUMP HOSES FOR LEAKS.IF YOU FIND NO LEAKS.THE HYDRALIC BOOSTER OR POWER STEERING PUMP FAULTY.

Posted on Jun 20, 2010

jturcotte
  • 8266 Answers

SOURCE: My brakes and power-steering are

Yes, your brakes are boosted by the power steering pump rather than by vacuum. I don't think it's air in the system. More likely your pump has failed, but you can try bleeding the pump. Here is a procedure from autozone.com:

Observe the following:
Use clean, new power steering fluid type only Hoses touching the frame, body or engine may cause system noise. Verify that the hoses do not touch any other part of the vehicle. Loose connections may not leak, but could allow air into the steering system. Verify that all hose connections are tight.


NOTE Power steering fluid level must be maintained throughout bleed procedure.

  1. Fill pump reservoir with fluid to minimum system level, FULL COLD level, or middle of hash mark on cap stick fluid level indicator.
    NOTE With hydro-boost only, the oil level will appear falsely high if the hydro-boost accumulator is not fully charged. Do not apply the brake pedal with the engine OFF . This will discharge the hydro-boost accumulator.
  2. If equipped with hydro-boost, fully charge the hydro-boost accumulator using the following procedure:
    1. Start the engine.
    2. Firmly apply the brake pedal 10-15 times.
    3. Turn the engine OFF

  3. Raise the vehicle until the front wheels are off the ground.
  4. With key in the ON position and the engine OFF , turn the steering wheel from stop to stop 12 times. Vehicles equipped with hydro-boost systems or longer length power steering hoses may require turns up to 15 to 20 stop to stops.
  5. Verify power steering fluid level per operating specification.
  6. Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
  7. Verify the fluid level. Repeat the bleed procedure if necessary.

Observe the following:



Use clean, new power steering fluid type only Hoses touching the frame, body or engine may cause system noise. Verify that the hoses do not touch any other part of the vehicle. Loose connections may not leak, but could allow air into the steering system. Verify that all hose connections are tight.
NOTE Power steering fluid level must be maintained throughout bleed procedure.
  1. Fill pump reservoir with fluid to minimum system level, FULL COLD level, or middle of hash mark on cap stick fluid level indicator.
    NOTE With hydro-boost only, the oil level will appear falsely high if the hydro-boost accumulator is not fully charged. Do not apply the brake pedal with the engine OFF . This will discharge the hydro-boost accumulator.
  2. If equipped with hydro-boost, fully charge the hydro-boost accumulator using the following procedure:
    1. Start the engine.
    2. Firmly apply the brake pedal 10-15 times.
    3. Turn the engine OFF

  3. Raise the vehicle until the front wheels are off the ground.
  4. With key in the ON position and the engine OFF , turn the steering wheel from stop to stop 12 times. Vehicles equipped with hydro-boost systems or longer length power steering hoses may require turns up to 15 to 20 stop to stops.
  5. Verify power steering fluid level per operating specification.
  6. Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
  7. Verify the fluid level. Repeat the bleed procedure if necessary.

Posted on Oct 24, 2010

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1 Answer

Changing pump and bleeding power stearing on a 1983 buick riviera


1. Replace any hydraulic line showing external damage. Rubber hoses more than 4 years old should be replaced. Install new seals for all disconnected fittings (as required) and install an in-line power steering filter. Tighten all hose fittings to OE specifications. 2. Flush the entire power steering system using the vehicle manufacturers recommended fluid. Fill pump reservoir to the proper level.
3. Disable engine to allow cranking without starting. This can be done by unplugging the main power wire (large red one) from your Delco HEI Distributor unit. Block wheels, put transmission in neutral or park and set parking brake, then crank engine 5 to 10 seconds (avoid overheating starter motor).
4. Refill pump reservoir as necessary. Repeat step 3 until level is correct.
5. Enable the engine to allow starting. Start engine and let idle. Slowly turn steering wheel from lock to lock a number of times.
6. Turn engine off and inspect fluid level and condition. Add or remove fluid as necessary. If fluid is foaming, wait one hour then recheck level. Repeat step 5 and 6 until fluid level is correct and shows no sign of air. If the problem persists recheck installation and connections.
1. With engine off, apply and release brake pedal 5 to 10 applications to deplete accumulator reserve pressure. With foot slightly pressing brake pedal, start engine. Pedal should drop and then push back against your foot.
2. With engine running, turn steering wheel until lightly against steering stop. After 5 seconds return wheels to the straight ahead position and turn engine off. Apply and release brake pedal. There should be at least one power assisted brake application. Start engine and allow accumulator to recharge before moving vehicle. 3. Test drive vehicle.
NEVER operate any vehicle until brake and booster systems are functioning properly. Remember, your vehicle is only as good as it's braking system. Brakes are the singlemost important component on any motorized vehicle.

Nov 06, 2016 | Buick Cars & Trucks

1 Answer

I changed my front pads and rooters on my 2002 suburban and now the power steering is out?


Phil: you probably got air into the power steering fluid assist piston. Try driving your car. The air should bubble up, keep adding the correct power steering fluid.

Mar 30, 2014 | Chevrolet Suburban Cars & Trucks

1 Answer

Borrowed vehicle from family, drove it home and was fine. drove approximately 3 miles the next day , stopped to drop off friend and when put back in drive had no power steering and the brakes are all but...


You have what they call a hydro boost system, the power steering pump give power steering assist, and give power brakes, so if your power steering hose looses fluid you get not power steering and no power brakes, So check the power steering hose for leaks if there is no leaks replace the powersteering pump

Nov 12, 2012 | 1994 GMC Safari

1 Answer

1979 Leocraft Motorhome /chev 454 power steering brake booster issue


Does the air pump or power steering feel
seized or tight?

The belts came off for a reason

Sep 04, 2012 | Cars & Trucks

2 Answers

My chevrolet astro lost power steering and the brakes are hard


Your van sounds like it has hydro-boost.It uses the power steering for brake boost instead of engine vacumme.More than likely you have had a power steering pump failure.

Apr 24, 2011 | 1997 Chevrolet Astro

1 Answer

My brakes and power-steering are not working. The brake pedal is hard, but the brakes will not engage. The power steering was not working at the same time. It has brake fluid, but when I took the power...


Yes, your brakes are boosted by the power steering pump rather than by vacuum. I don't think it's air in the system. More likely your pump has failed, but you can try bleeding the pump. Here is a procedure from autozone.com:

Observe the following:
Use clean, new power steering fluid type only Hoses touching the frame, body or engine may cause system noise. Verify that the hoses do not touch any other part of the vehicle. Loose connections may not leak, but could allow air into the steering system. Verify that all hose connections are tight.


NOTE Power steering fluid level must be maintained throughout bleed procedure.

  1. Fill pump reservoir with fluid to minimum system level, FULL COLD level, or middle of hash mark on cap stick fluid level indicator.
    NOTE With hydro-boost only, the oil level will appear falsely high if the hydro-boost accumulator is not fully charged. Do not apply the brake pedal with the engine OFF . This will discharge the hydro-boost accumulator.
  2. If equipped with hydro-boost, fully charge the hydro-boost accumulator using the following procedure:
    1. Start the engine.
    2. Firmly apply the brake pedal 10-15 times.
    3. Turn the engine OFF

  3. Raise the vehicle until the front wheels are off the ground.
  4. With key in the ON position and the engine OFF , turn the steering wheel from stop to stop 12 times. Vehicles equipped with hydro-boost systems or longer length power steering hoses may require turns up to 15 to 20 stop to stops.
  5. Verify power steering fluid level per operating specification.
  6. Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
  7. Verify the fluid level. Repeat the bleed procedure if necessary.

Observe the following:



Use clean, new power steering fluid type only Hoses touching the frame, body or engine may cause system noise. Verify that the hoses do not touch any other part of the vehicle. Loose connections may not leak, but could allow air into the steering system. Verify that all hose connections are tight.
NOTE Power steering fluid level must be maintained throughout bleed procedure.
  1. Fill pump reservoir with fluid to minimum system level, FULL COLD level, or middle of hash mark on cap stick fluid level indicator.
    NOTE With hydro-boost only, the oil level will appear falsely high if the hydro-boost accumulator is not fully charged. Do not apply the brake pedal with the engine OFF . This will discharge the hydro-boost accumulator.
  2. If equipped with hydro-boost, fully charge the hydro-boost accumulator using the following procedure:
    1. Start the engine.
    2. Firmly apply the brake pedal 10-15 times.
    3. Turn the engine OFF

  3. Raise the vehicle until the front wheels are off the ground.
  4. With key in the ON position and the engine OFF , turn the steering wheel from stop to stop 12 times. Vehicles equipped with hydro-boost systems or longer length power steering hoses may require turns up to 15 to 20 stop to stops.
  5. Verify power steering fluid level per operating specification.
  6. Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
  7. Verify the fluid level. Repeat the bleed procedure if necessary.

Oct 24, 2010 | 2005 Chevrolet Silverado

1 Answer

2000 H1 suddenly steering locked up while moving. very difficult to turn with engine on , will turn smoothly with wheels up and engine off. Brake is hard and feels like bubbles underfoot when applied ....


Good day. Please check that all fan and V bellts are in place. Your power steering pump runs with a belt, and the brakes could be of the hydraulic type. Check your power steering pump for failure if all else fails. Hope this helps

Aug 17, 2010 | 2004 Hummer H1

1 Answer

Sudden power steering and or brake failure engine still running


power steering pump failing .your truck has the hydro brake booster system.your steering pump control steering and brakes if power steering fail your brakes will also fail.

May 01, 2009 | 2008 Ford F 250 Super Duty 4WD

2 Answers

1996 GMC Suburban Brake and Power Steering Failure


if you got the hydro brake boost system .check your power steering pump hoses for leaks .check master cylinder is leaking. fill power steering pump and master cylinder with fluid. the one that is the lowest that the one leaking. if your hydro boost brake unit is leaking .replace it .if power steering pump leaking. it not the hoses replace it . because if power steering goes out brakes will also go out.

Apr 29, 2009 | 1996 GMC Suburban

3 Answers

Power steering & power brakes


Sounds to me like your power steering pump has gone bad. Being a vehicle with a hydro-boost brake system that would explain the power brake failure. Hydro-boost brake systems utilize pressurized power steering fluid to provide brake assist. In most lighter GVWR vehicles this function is performed by engine vacuum. There is a recall on certain Silverados and Sierras that addresses a faulty check ball in the booster, but your vehicle is affected by a steering issue as well. This would indicate to me that it is the pump. You can however check online to verify if your vehicle is affected by the recall. Hope this helps.

Nov 04, 2008 | 2002 Chevrolet Silverado

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