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Power steering and brakes quit working on 98 suburban 6.5 diesel

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  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?

Posted on Aug 19, 2010


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I have a 02 suburban my powere brakes and steering just stopped working is there a fuse or relay for this and where is it located? Thanks

Your suburban uses power steering pressure for your brake assist. This system is called "hydroboost". There is a problem with either your power steering pump or lines.

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diesels do not have conventional vacuum operated brake boosters. i am not sure what chrysler calls there system, but i believe it is similar to the gm hydroboost system, in which case pressure is created by a pump integral to the power steering pump gives you your assist, and fed to an accumulator on the fluid booster near the master. be very careful when tinkering when these systems, as they can have very high pressures in them even when the car is not running. are you experiencing any steering issues at the same time? check your fluid levels (PS fluid will effect operation) and all the associated hoses and lines, go from there. good luck!

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Could be a brake pad/caliper locking up on your left wheel. That'll make that wheel turn slower resulting in the veering left.

Could also be a wheel bearing. However usually you'll hear a grinding noise to go along with that. And it'll pull rather consistently in that direction rather than suddenly.

Or, what first comes to mind is that your steering box is loose, or the gear inside the steering box is stripped in one spot. Or your front tie rods could be shifting or possibly ball joints. These would cause a sudden shifting/veering.

All of these things are front end related. And also very dangerous. Take it down to any alignment shop, have them put it on a lift, and diagnose immediately.

Worse case scenerio is that a front end part breaks and sends you out of control and into someone else. Please get it checked. A diesel Suburban could do a lot of damage.

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