03 GMC Sierra steering box keeps blowing return line off
Have new steering pump, along with rebuilt steering box, high pressure supply hose with new pitman arm. Steering seems to bind up half way through turn and blows return line off steering box. The pressure seems way to high on return line. Bed all air out while up off ground, put on ground and it blows hose off even witth good clamp
Re: 03 GMC Sierra steering box keeps blowing return line...
Lines not in the correct ports
low pressure hoses are clamped
high pressure are screwed in some how there is a cross porting causing the lock up problem and that is putting high pressure into the low pressure port
This is how I do it. I spray alot of PB Blaster all over the connection and take a large hammer and hit the side of the pitman arm and keep spraying and hitting. It'll come loose and fall off. You have to break up the rust "welding" it together.
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
This could possibly be a block in your heater core or the thermostat may be going bad and not circulating the antifreeze the way it should once the engine has warmed up. Have you had your antifreeze system flushed? If its a 2000 then its 10 years old and the system should be flushed and refilled
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Sounds like the high pressure power steering hose is leaking. Check it out and if so replace it along with the low pressure return line. If the lines are not leaking then the power steering pump could be the problem.
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.
1. Remove the serpentine belt. 2. Remove the nuts holding the main fuse box over the battery. 3. Remove the reinforcing bar over the battery. 4. Remove the battery. 5. Remove the windsheild washer tank. 6. Now you have access to remove the pump pulley. Without removing the stuff, it may be possible, but it will be extremely difficult. 7. Remove the pump pulley. 8. Loosen the high pressure hose fitting. 9. Remove the return line clamp. 10. Remove the power steering pump mounting bolts. 11. Remove the high pressure hose fitting. 12. Remove the power steering pump while sliding off the low pressure hose. 13. Remove the clips holding the reservoir on the pump. 14. Remove the reservoir. 15. Install new o-ring on the reservoir. 16. Install reservoir on new pump. 17. Install clips to hold reservoir on pump. 18. Install new o-ring on high pressure fitting. 19. Place new pump in position while sliding on low pressure hose. 20. Loosely attache high pressure fitting. 21. Tighten pump to mounts. 22. Tighten high pressure fitting. 23. Install clamp on low pressure hose. 24. Install power steering pulley. 25. Install washer reservoir. 26. Install battery. 27. Install reinforcing cross member. 28. Install fuse panel. 29. Install serpentine belt. 30. Bleed the power steering system.
RETURN TURN LINE GOES TO THE LEFT OF RACK PINION AND HIGH PRESSURE HOSE GOES TO THE RIGHT OF RACK PINION.LOOKING AT POWER STEERING PUMP HIGH PRESSURE HOSE THICK HOSE SCREWS INTO POWER STEERING PUMP.WHILE LOW PRESSURE HOSE HAS A HOSE WITH A CLAMP THE LOW PRESSURE HOSE HOOKS TO TOP OF POWER STEERING PUMP.LOW PRESSURE DONT SCREW INTO POWER STEERING PUMP IT IS HELD IN PLACE BY A HOSE SMALL CLAMP.
I'm not sure what engine you have in your truck but the chevy's are pretty staight forward in design. Out of the two hoses that you have one is a pressure line and the other is the return. Mostly on the Chevs the pressure is the one that will give you a problem. The one that you can see and is easily accessible is most likely the return line and is a hose on a barbed fitting with a hose clamp. The other is the pressure and as the name suggests the hose clamp will not hold this one so yes it has a fitting that screws into the back of the power steering resevoir. Sometimes you can get to the resevoir from underneath but most likely you will have to remove the power steering pump to get at the hose to reattach the new one. usually not as easy as it sounds as you will have to remove the pulley (press fit) with a power steering pulley remover/installer to access one of the mounting bolts behind it. Hope this helps.
Not really expensive just messy to repair. Return lines (low pressure) are much more common and they travel along the frame rail on the right side of the subframe from the power steering rack to the cooler line in front of the radiator. The high pressure line starts at the pump and travels over the top of the motor to the back side (it's a thick line with a big banjo bolt at the pump). They go too but less frequently.
If it's the return line and not the pressure line you can cut it and put some rubber hose from the parts store over the cut part with a couple clamps and that'll hold you for quite a while till you can get the line and get it installed.
The return line, done correctly, can be a bit of a bear on the ground but it's fairly quick in the air on a lift at a garage. The pressure line isn't too bad and can be undertaken by the home mechanic.
IF THE RESERVOIR IS LEAKING YOU SHOULD REPLACE THE UNIT. CHECK THE LINES FIRST AND SEE IF ONE OF THE HOSES COULD BE THE PROBLEM. THE LINE THAT IS BOLTED TO THE PUMP IS THE HIGH PRESSURE SIDE THE ONE WITH THE CLAMP IS LOW PRESSURE
disconnect the return line at pump put it in a jug start the engine check for cirrulation and too bleed air keep filling pump if you have no cirrulation the reconnect the return hose and discnect the supply too see if it pumping if it is then you have a blockageif not then you may have a bad pump
The high pressure and low pressure hoses are different sizes at the gear box. And the low pressure /return hose is usually rubber with a clamp at the back off the pump.
I just found 1 of my power steering leaks in my 1990 toy pickup. My high pressure line has a hole in it. I used a florecent die kit to locate the leak. You can get it at Autozone.
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