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Hydro-boost on 1985 Diesel Chevrolet truck

There is a leak from I believe the hydroboost. I was wondering if anyone knew where to get pictures of a hydroboost from this vehicle.


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Hydro-boost on 1985 Diesel Chevrolet truck - 2f17897.jpg

Posted on Feb 08, 2009

  • Randy Hough
    Randy Hough Feb 08, 2009

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2004 Chevy tahoe power steering an power brakes went out at the same time what should I check first

Sounds like you have hydroboost, an alternative to vacuum booster for brakes. Hydraulic pressure from steering is used as driver assist for the brakes.

You can read about it on the link. Hope it helps.

Oct 18, 2016 | Cars & Trucks

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I have a 99 chevy one ton....just replaced the hydroboost and now the brakes get sucked to the floor...ive checked for kinks in lines or blockage still no do I fix ths

You may have a internal leak in the master cylinder remove it from the hydro booster and check to see if there is any fluid coming out the back if not the inner seals are bypassing that's why you got no pressure.

Mar 10, 2014 | Chevrolet Cars & Trucks

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What causes the brakes and power steering to go out at the same time?

Are you a diesel? If you are do the recall ,for the hydro boost (brakes) you sound like it.There is a recall on the hydro boost and yes this is a power steering assist, and a brake power assist
Recall I.D # 04045000

May 02, 2011 | 2004 GMC Sierra 2500

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My brakes feel hard and the abs does not work i dont think also no power steering looked at new ones at auto zone they asked me if it had vacuum boost or something makes me almost think the vacuum is bad...

It likely has hydroboost brakes. A bad power steering pump or a power steering pump that is low on fluid would cause all your problems. Is this gas or diesel?

Jan 23, 2011 | 2000 Chevrolet Silverado 2500

1 Answer

Power steering and brakes quit working on 98 suburban 6.5 diesel

  1. diesel uses what they refer to as hydro-boost to create pwr brake boost
  2. if the p/s and p/ brakes both go out at same time
  3. check p/s belt
  4. fluid level in pwr steering pump
  5. have any repairs been done recently to p/s hoses?

Aug 19, 2010 | 1998 Chevrolet Suburban

4 Answers

2001 RAM 2500 Brake Pedal Goes to Floor

Excessive runout or wobble in a disc (Rotor) can increase pedal travel due to piston knockback and increase piston seal wear due to necessity of caliper to follow disc wobble. Thickness variation in a disc can also result in pedal pulsation, chatter and surge due to variation in brake output when disc section is uneven. Dishing or distortion can be caused by extreme heat and abuse of the brakes. Hope this helps, Good luck.

Apr 07, 2010 | 2001 Dodge Ram 2500 Truck

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I replaced the hydro boost on my 2000 2500 silverado because the original one was leaking.since then the brakes seem to have no power or boost.i purchased the reman. from o' you think the reman...

It could be defective it just gets install make sure you have enough power steering fluid at the power steering pump, I have tow trucks with hydro boosters and they just get install and that's it. return it and get another one.Hope this was very helpful.

Jan 30, 2010 | 2000 Chevrolet Silverado 2500

1 Answer

My 03 Denali makes a loud whinning noise when I accelerate mechanic says needs to replace brake hydroboost

It could be any thing from the alternator to the Power steering pump. The power steering pump feeds the hydro boost unit. It is unlikely the hydroboost is causing the noise. I recomend you take it to the dealer and have them perform the proper diagnostics as they will have the proper pressure gauges and equipment needed to perform the tests.

I hope this helps.


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2 Answers

Power steering went out along w/brakes

Does it have a hydroboost brake booster? Is the belt still on the p/s pump? Have you checked the power steering fluid level? If yes and good to all, replace the Power steering Pump.

Mar 26, 2009 | 2005 Hummer H2

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