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I have a 2006 chevy silverado with a 6.6 litre diesle that has what i think is a power steering fluid leak up at the master cylander or break booster on the fire wall the hoses run from the power steering box on the front of the engine to this location then down to the rack or gear box are you familliar with this?

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The Duramax trucks by Chevy and GMC use Hydro-Boost brakes, meaning that they use a hydrolic pump for the brakes and the steering. GM has had real trouble with leaky Hydrlic hoses on all their trucks for a few years (like my truck) for leaking coolant lines from the trans and as I found out today during my oil change, coming from the hydro-boost. These are replacable, but not under warrenty for you or me.

Posted on Jul 17, 2010

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Generally, the power steering fluid and the brake fluid are separate entities.

Sometimes the power steering return line can go around the engine compartment to cool the power steering fluid, as in the 1990 Cadillac Deville, for instance, which is a GM product.

Hope this helps.

Posted on Jul 06, 2010

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1 Answer

I have a 2006 chevy silverado i have changed master cylinder and booster and rear brake shoes but pedal stills goes to the floor tried bleeding brakes but get no fluid to the front brakes only the the rear...


you can buy or make a steel cover with a rubber gasket that will replace the top on the master cylinder. It also as a pressure hose attachment so that you can place a small amount of pressure on the top of the oil thus by pushing on the oil in the master you force the oil through the brake lines and purge the system of any air-- I think Snap on also sells this special tool.

Aug 25, 2014 | 2006 Chevrolet Silverado 1500 2WD

1 Answer

2001 Silverado 2500 HD Why Rear brakes don't work after I installed new hydro-boost power booster, master cylinder, calipers, and pads. I bled master cylinder before installing, and brakes beginn


Hello Patricia,

Have you checked the master brake cylinder reservoir for brake fluid loss?

I don't suspect the master cylinder as you have replaced it... but am more suspect of a leaking brake line or fitting which should have
been discovered when you had the system bled.

The only time I ever had a rear brake problem with a 2500 series Chevrolet was due to seized rear brake caliper guide pins...as your calipers are also new that is not your problem.

If your brake pedal feels spongy and travels to the floor board you have air in the system, a brake fluid leak or a failure in the power steering system, such as a broken hose, broken power steering pump drive belt, or failed pump, would result in a loss of pressure to both the hydro-boost and steering.

Find more information here:

. Hydro Boost Power Assist Systems Operation Diagnosis and Repair

Jul 23, 2017 | 2001 Chevrolet Silverado 2500HD

1 Answer

Power steering leak


Lingo is o.k., but I think you may be confusing power steering with power brakes. Power steering has no master cylinder (brakes do) and no power booster (brakes do). The power steering pump is mounted on the front of engine and run by the fan belt or the serpentine belt. The p/s hoses are 2- a pressure line and a return line, and run from the pump to the steering box or to the rack and pinion steering gear.
It just sounds like you have a brake fluid leak at the master cylinder. If it is, you need a new or rebuilt brake master cylinder.
Good luck. Post back for more.

Jul 09, 2012 | GMC Cars & Trucks

1 Answer

2002 Cadillac Escalade is leaking power steering fluid from what appears to be a weep hole on the bottom of the hydraulic brake booster. Does the entire booster assembly need be replaced or is there a...


are you talking about brake fluid --power steering lines do not connect to the brake system --- also their is no weep hole at the bottom of the brake booster ---can you please clarify what is leaking and where --power steering lines from pump to radiator to steering rack ----brake booster mounted to fire wall with brake master cylinder bolted to front

Oct 05, 2011 | 2002 Cadillac Escalade

1 Answer

2001 Chevy Silverado 3500 6.0L V8 4x4 Dually, I replaced the power steering pump about 2 months ago, now I have power steering fluid leaking from underneath drivers side dash and carpet is saturated, also...


This sounds like the hydroboost unit is leaking.behind the master cylinderThe braking system on this using the power steering pump to provide power assisted brakes instead of a brake booster. The hydroboost unit most likely needs replaced.

Apr 19, 2011 | Chevrolet Silverado 3500 Cars & Trucks

1 Answer

I drive a Chevy Venture 2004. in the mornings, when I start up the engine, the brake pedal goes down when I push it. Sometimes, when I am driving slow and I push the brake, it goes down, more than normal....


first check brake fluid level
if fluid is low, this is a good indication that pads or shoes need replacing
check brake lings for wear
check that pcv valve from engine to brake booster is not clogged
to check this pull it out of valve cover and shake it
if it rattles it is good
if it dont rattle it is clogged,replace it
if pads and linings are good and no obvious signs of brake fluid leaking anywhere,(wheels cylanders etc>then the brake master cylander or brake booster is bad
more likely to be booster

Dec 16, 2010 | 2000 Chevrolet Venture

1 Answer

I need to top up the power stering fluid and need to know what tipe to use 1988 chevy silverado C3500 454 The power steering looks like it is incorperated into the brake booster


power steering is at the front of the engine and runs on the belt. The reservoir cap looks like this:
73b4b95.jpg To top off steering fluid, use standard steering fluid.

The reservoir in front of the brake booster is the brake master cylinder reservoir. To refill, use standard brake fluid. If it the truck is using brake fluid, check for leaks at the back of the master cylinder and at all wheels.

Please let us know if you have more questions.

Sep 25, 2010 | 1988 Chevrolet Silverado 2500

4 Answers

Brake fluid leaking inside car onto floor mat.


Bad Master Cylinder and or Power Brake Booster would be the first things to check.. look for signs of a leak under the hood first, monitor brake performance!!

Feb 09, 2010 | 2006 Ford Focus

1 Answer

Power steering pump blew a hose off and now whines.


Have you checked the level of fluid in the pump? If it is full, you may have damaged the pump with it ran low. Try a Power Steering Lubricant first but if it is full and still making noise it is time to replace.

There are a few models that use the power steering pump at the booster for the brakes, but I doubt that yours is that. Look at the brake master cylinder. If it has this big round black drum, you have a vacuum assist and there is no correlation. If it has a couple of hoses going to an item behind the master that look like the hoses on your power steering there may be a correlation. Most of the diesels had the power steering booster.

Hope this helps

Jan 28, 2010 | 2001 Chevrolet Silverado 1500

1 Answer

Power assist leaking between master cylinder


If it is leaking fluid between the booster and the master cylinder, you need a new master cylinder. If it is leaking vacuum when you push the brake pedal, you need a new booster and master cylinder.

Jul 15, 2009 | 2001 Chevrolet Silverado 1500

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