Question about Hummer Cars & Trucks
What you describe could be warped brake rotors or bad wheel bearings. Doesn't sound like the power steering pump.
Posted on Jan 08, 2013
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Posted on Jan 02, 2017
sounds like the problem is in the valving in the steering box. You may have to get a new steering box. i would get it checked.
Posted on Jun 29, 2008
SOURCE: hydro boost
Appreciate the "Ask Me" and my compliments, scary driving one of those in our roads.
Might you have to check the Brake Booster. Normally, there would be a vacuum line to the booster from the intake manifold. Common design calls for a PCV type valve at the entrance to the booster. Pls check this. It also operates on the same principle and therefore checks the same, you can blow one way but not the other; would have a sliding ball inside that acts as the valve. In some instances, it could be the diaphragm inside that might have a tear.
Of course, the Proportioning valve system must likewise be checked. I have heard a lot of brake problems with K2500 especially the rear drum.
Incidentally, there was a recall order of some sort. TSB 99-05-24-001A SEP 99 which addressed brake pull/wear, the recall involved replacing the proportioning valve.
Good luck and kind regards. Thank you for using FixYa.
Posted on Aug 10, 2008
How does the hydro boost fell "funny" - does the brake pedal go to the floor? Do the brakes lock up? engage immediatly? Does the brake light stay on, come on while brakes are applied? Have a diagnostics test done on it at a local auto parts store (usually a free service; stores may vary) and see if any codes show up. If so, the person submitting the test can tell you what the code(s) mean, and what to do to fix the problem.
Posted on Mar 31, 2009
What happens is if you have a bad front wheel bearing when you brake that wheel will turn in or out,when this happens it throws the four wheel alignment out and since this is a solid rear axle,it's forcing it to flex on the suspension,wich could cause the rear tires to bite on the outside edge of one tire and the inside edge of the other,thats one possible the other would be that the rear brakes are are not slowing the wheels evenly causing the same issue.I saw this problem with a bad front wheel bearing on a Nissan Pathfinder but not as pronouced due to the independent rear suspension. Check the front wheel bearings,which of course will mean getting the calipers off the rotors,and then check for any movement in the rotor,if there is check the hub nut,if it's loose tighten it and check for play in the rotor if there is still play that's going to be caused by a bad bearing.You can check the braking in the rear with a simple spring scale(like the ones used for fishing),with the wheels removed have someone apply enough pedal pressure to just engage the brakes but still allow movement attach the scale hook to a wheel stud and pull until it starts to move and note how many pounds of pressure it takes to move the hub.If it's uneven chech your adjusters and even them if needed and then retest,if still uneven you'll need to bleed them again.As far as the dark black substance in the fluid I would say you may gotten a contaminent in the fluid.Brake fluid gets kind of a rusty reddish residue when it breaks down.If I missed anything or you need clarification don't hesitate to ask I'm home all day.Hope this helps solve your problem.
Posted on May 05, 2009
I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!
Posted on Oct 11, 2009
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