I have a durabilt 1404 and the unit it all of the sudden not getting enough pressure to right and is whining real high. Any suggestions?

It could be anyone of ur pulleys check for play

You could start with the sending unit. Could be a wiring problem or it could actually have high oil pressure.
The sending unit is near the oil filter on the 6 cyl engine and I think on the 8 cyl too.

Could be one of the belts slipping or worn out. Might even be the water pump bearing. Does the whine increase/decrease as you rev? Whine louder if you suddenly accelerate?

WHEN IS THE LAST TIME YOU CHANGED THE TRANS FILTER AND FLUID.....AUTOMATIC? START HERE!

Whining should be low power sterring fluid.
Check the power steering dipstick and keep it in the range.
If you have no power steering fluid, automatic transmission fluid ( Dexron) works fine.
Leaks best found with a flashlight, you should not need the engine running, but you will need to get under the car, and you may need to push or bend some of the plastic sheilds out of the way to look.
Most often it is a hose, high or low pressure hose to the power steering pump that leaks.
High pressure hose has fittings, low pressure hose may have a hose clamp.

First, you need to make sure you are using the right fluid. Your system call for Dexron II or Dexron III automatic transmission fluid. Other fluids may "cavitate" or "foam" in your system and cause the whining noise you are describing.

Then, when bleeding the system, you need to let the foam settle for half an hour or more between "bleedings".

Start the engine, turn the steering wheel full lock left and right about 3 times. NOTE: When at full lock, hold the wheel there for about 3 seconds before turning in the other direction. (this will force fluid to flow through the pressure relief valve in the pump.) DO NOT hold at full lock for longer than 5 seconds - system damage can occur.

Then shut the engine off and wait for the foam to settle, (about 1/2 hour)then repeat. It may take 4 or 5 times to get all the air out so it doesn't make any more noise. Also note that normal driving of the car does nothing to get the air out. The fluid must be forced through the pressure relief valve to have enough pressure/flow to release the air trapped in the rack and pinion unit.

HIGH PITCH WHINNING NOISE IS FAULTY TRANSMISSION OIL PUMP.HAVE THE TRANSMISSION FLUID PRESSURE CHECK AT A TRANSMISSION SHOP.IF TRANSMISSION OIL PUMP TOO WEAK OR MALFUNCTION.YOUR TRANSMISSION WONT HAVE ENOUGH OIL PRESSURE FOR FORWARD GEAR , REVERSE GEAR, BAND OR SHIFT VALVES IN VALVE BODY.NOTHING WILL WORK TRANSMISSION.OIL PUMP LIKE HYDRALIC PUMP KEEPS EVERY THING WORKING..

It could be a bunch of things I would check the fuel pump relay first its located inside the glove box behind a panal that says relays its the one on the far left . The way the fuel system on this vehicle works is the fuel pump will still work if the relay is bad because the system it backed up through the oil pressure sending unit. That is what actualy sends the voltage to the fuel pump however the sending unit has a switch inside of it that needs the oil pressure to be high enough to trip the switch to send this voltage to the fuel pump. On a cold day the oil pressure can't build high enough to trip this switch so you get no fuel this it why they tell you to put 5 30 wight oil in the engine. This isn't the olny possible answer to your problem however its what i would look at first and if your running 10 30 i would also replace the oil pressure sending unit. Im assumeing that the vehicle is cranking but not starting from what you have said ?but let me know i know how this vehicle works

Bad fuel pump maybe. Turn the car on and stand near the rear of the car. If the fuel pump is running, you will hear it. Very high pitched whining noise. If it is all quiet, the pump not running. GM fuel pumps are loud.

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.