2001 5.3 yukon with no power steering.
2001 yukon with no power steering. fluid level good. belt looks good. Any thoughts? Went out while backing up with camper. Wheel was turned all the way to one side and a small thud/bump was felt in steering when it went out. More
2001 yukon with no power steering. fluid level good. belt looks good. Any thoughts? Went out while backing up with camper. Wheel was turned all the way to one side and a small thud/bump was felt in steering when it went out.
Additonal info - Jul 07, 2009 - I was in the middle of my yard which is all grass. I cannot think of anything that was hit. I had to pull in and out of the spot a couple of times due to the difficulty of where I was putting the camper (Had to weave around some trees) but no major torque / collision was put on the front wheels. Just moving from one direction to the other in grass numerous times.
Additonal info - Jul 13, 2009 - Ok. So I installed a new p/s pump and now I only have power steering when revving the truck to 4-5000 RPMs. I bleed the system as the manual stated (which states specifically not to max the steering on either side lioke the auto parts store said). I am wondering about 2 things now... 1) is the pressure sensor bad? 2) Did I get a bad reman pump? Any thoughts/comments would be a great help.
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Re: new Power steering pump but no p/s @ low RPM
Don't think the pressure switch would do that. Sounds more like a bad pump (they have people that can't tie their own shoes building this stuff thanks to outsourcing to other countries) Failure rate on rebuilds is far higher than it used to be. Reason I believe the pump may be the problem is that it does seem to work at high rpm's...tells me that it either has an internal pressure bypass or not making enough pressure. Could be wrong, but I'd get another one first.
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Have you checked the level of the power steering fluid if it is low it can cause a noise similar to what you described. The power steering pump could be starting to fail and making the noise. I would suggest checking the power steering fluid level and if low, they make some fluid that has power steering fluid conditioner, supposed to help extend the life of the power steering pump, if it is low you need to follow the lines from the pump and see if you can find a leak anywhere. also I would take notice of the color of the power steering fluid, if not too much trouble maybe take a picture of the fluid and upload it here, the fluid can break down and need to be replaced.
If the belt and fluid levels are correct there is a good chance it may be a bigger problem. The power steering pump may be the fault. At lower speeds a worn pump isn't turning fast enough to push enough fluid. When you REV the engine your speeding up the pump pushing more fluid. Get the pump checked. If that's ok your possibly looking at a problem with the rack itself. ($$$ Ouch!).
Possible that the PUMP is not active or working to the desired level . It can also be due to air within the hydraulic system and will require a reset on the unit. Make sure that the belt is not slipping on the pulley .
CHANGING POWER STEERING PUMP YOU HAVE TO PLACE A DRAIN PAN UNDER THE VECHICLE. SIPHON OUT POWER STEERING FLUID WITH A SIPHONER DONT USE YOUR MOUTH TO SIPHON SWALLOWING POWER STEERING FLUID CAN BE FATAL MAKE YOU SICK.WHEN ALL POWER STEERING FLUID IS REMOVED FROM POWER STEERING PUMP.REMOVE DRIVE BELT.THEN REMOVE THE POWER STEERING PUMP.THEN YOU HAVE TO REMOVE THE POWER STEERING PUMP PULLEY THE NEW POWER STEERING PUMP DONT HAVE A PULLEY YOU HAVE TO HAVE REMOVE PULLEY FROM THE OLD POWER STEERING PUMP.YOU NEED A PUMP PULLEY REMOVER AND A PULLEY INSTALLER.YOU CAN TAKE OLD POWER STEERING PUMP AND NEW POWER STEERING PUMP TO A MACHINE SHOP.THEY WILL REMOVE PULLEY OFF OLD PUMP PRESS IT ON NEW POWER STEERING PUMP.THAT WOULD BE CHEAPER THAN BUYING THE PULLER AND INSTALLER.GO TO AUTO PARTS STORE BUY NEW HIGH PRESSURE LINE O RING GOES TO PRESSURE LINE GOING INTO POWER STEERING PUMP.ONCE YOU GET NEW PUMP READY PULLEY BEEN PRESSED ON.TAKE POWER STEERING PUMP HOME PUT IT ON. BLEED POWER STEERING SYSTEM.WHAT YOU DO WHEN YOU GET NEW PUMP INSTALLED HIGH PRESSURE LINE IN PLACE.PUMP BOLTED IN DRIVE BELT ON POUR POWER STEERING FLUID IN POWER STEERING PUMP UNTIL FLUID LEVEL STOP DROPPING AND YOUR LEVEL ON POWER STEERING DIP STICK AT COLD LEVEL.NOW START CAR UP LET IT IDLE FOR 3 MINUTES.THEN TURN OFF ENGINE CHECK POWER STEERING FLUID IF FLUID LEVEL DROP ADD LITTLE MORE UNTIL LEVEL ON DIP STICK ON COLD MARK DONT OVER FILL.NOW SAFELY RAISE SUPPORT FRONT OF VECHICLE. START THE ENGINE.TURN STEERING WHEEL FROM ALL THE WAY FROM LEFT TO RIGHT DONT STOP LOCK WHEEL .GO LEFT TO RIGHT SEVERAL TIMES.THEN TURN OFF ENGINE CHECK FLUID LEVEL.IF ALL IS GOOD LET VECHICLE BACK DOWN LET IT SIT FOR A WHILE CHECK FLUID AGAIN.DONT DRIVE VECHICLE IF POWER STEERING PUMP MAKE NOISES OR YOUR STEERING FEEL STIFF HARD TO TURN.JUST MAKE SURE FLUID LEVEL RIGHT AND DRIVE BELT TIGHT GOOD LUCK.
Problems associated with low power steering fluid… Hard Vehicle Steering A low power steering fluid level can often times cause a vehicle's steering to become hard and labored. Adequate amounts of power steering fluid are necessary to enable a vehicle's power steering system to function and operate at optimum levels. A lack of power steering fluid in a vehicle's power steering system reduces the amount of hydraulic fluid pressure necessary to efficiently operating the various parts of the entire power steering system. Power steering fluid supplies the fluid force needed to operate the power steering gears and to enable power steering gearbox operation. Low power steering fluid levels reduce this hydraulic pressure, which commonly results in hard vehicle steering. Pump Noise It is very common for a low power steering fluid level to cause significant power steering pump noise. An adequate amount of power steering fluid is required to ensure the proper function and longevity of a power steering pump unit, which is a belt-driven pump responsible for housing and circulating power steering pump fluid. A low level of power steering fluid results in increased power steering pump friction, heat, and wear, all of which can significantly reduce the operational life of the power steering pump while at the same time cause excessive power steering pump noise. Fluid Boiling
Many times a low power steering fluid level can result in excessive heating of power steering fluid, a condition that can seriously degrade the fluid and cause it to boil. A low power steering fluid level results in less available fluid to both lubricate and cool a power steering pump unit. A lack of power steering pump lubrication and cooling leads to excessive heat being generated within the power steering pump unit itself, a condition that translates into the available level of power steering fluid becoming super-heated and degraded. When this happens it is common for the power steering fluid to boil and lose all of its lubricating and heat-reducing capabilities.
The power steering gearbox is a set of gears within a vehicle's power steering system designed to facilitate movement of a vehicle's front wheels. The power steering gearbox is connected to the power steering pump by hydraulic fluid lines that deliver a constant supply of power steering fluid to the power steering gearbox. A low power steering fluid level, especially a chronic and severe low power steering fluid level, can lead to increased friction and wear within the power steering gearbox assembly, a condition that can significantly shorten the operational life of the power steering gearbox and negatively affect its operation
well your power steering pump could have went out, but crank it up take the lid off and look inside while someone turns the wheel and see if the fluid is moving around and then have them do it while its in park wile giving it some gas and check again to see if its moving if not its probably went bad
Find the leak and repair it...It is a sealed system, if you are adding large amounts of power steering fluid, it is leaking out somewhere. Hoses, reservoir, steering box, power steering pump are places to check. You should only have to add minimal fluid to the system for the entire year.
The immediate squeal you hear is most probably the unit is out of fluid or has leaked onto the serpentine belt and causing it to slip.
Fix the leak and check your serpentine belt for wear.
Check to see if the power steering pump is still turning. If you have a broken drive belt (serpentine belt or "fan" belt), and the pump doesn't turn, you have no power assist. If the pump is still turning, check the fluid level in the reservoir.