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Diagram of hydro multi-s booster type 2cr5-7 - Grundfos S2 Simplex Panel

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2002 chevy silverado 2500 hd with duramax no brake or steering power. do I need to replace or repair hydro booster?


It definitely sounds like the hydro booster. There are videos on YouTube that shows you how to do either. Depending on your skill level will determine which one you do. The main issue is bleeding the air out of the booster. It can be difficult. You will also need to bleed your brakes completely afterward. GMs are notorious for having the hydro boosters die on them.

Sep 09, 2017 | 2002 Chevrolet Silverado 2500HD

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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

Replaced the brake booster, trying to


Did you remove the pin from center of the old booster and put it in the new one?

Jul 08, 2010 | 2003 Chevrolet Silverado 2500HD

1 Answer

I need to replace a hydro brake booster in a 1987 lincoln continental but some one replaced it with a diffrent kind of hydro booster and it has no part #s just casting numbers


you can call the local dealer and give them the VIN number, they should be able to tell you what goes in there.
E7LY2C257A this is the part number I can only come up with and it's not cheap

Mar 07, 2010 | 1998 Lincoln Continental

1 Answer

Loss of brakes and steering


sounds like you've got a bad power steering pump. i'm not familiar with your vehicle, but some brake boosters run off vacume from the engine and others run off the power steering pump and it's called hydro boost. if you have the hydro boost type, this is most likely your issue.

Feb 09, 2010 | 2001 Chevrolet Silverado 2500HD

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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