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Power steering leak

Tiny
RAFFIEARL
  • MEMBER
  • 2004 GMC CANYON
  • 5 CYL
  • 4WD
  • AUTOMATIC
  • 112,000 MILES
My power steering pump has a leak and looking at it I can't tell if it is the hose or the side of the pump. I added Lucas power steering pump seal and filled the reservoir and by the morning it was empty. The truck had not been used so it doesn't just leak under pressure. I would like to do it myself but I am not a real mechanic.
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Wednesday, April 22nd, 2020 AT 8:44 AM

18 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi,

Looking at the pics, I only see a small amount of a leak in pics 1 and 2 along the edge of the reservoir. Do you have any other pics that show more? Also, if you look below the vehicle, does it appear to be draining from where the pump and reservoir are located?

Here is a quick link discussing common issues with the power steering. Take a look through it and see if it is helpful.

https://www.2carpros.com/articles/power-steering-problems

Let me know.

Take care,
Joe
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Wednesday, April 22nd, 2020 AT 9:04 AM
Tiny
RAFFIEARL
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  • 12 POSTS
Hi Joe,

I did 2 videos one from under the truck, and the other the sound it makes when I turn the steering wheel. I used Lucas power steering fluid stop leak again to fill the reservoir.
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Wednesday, April 22nd, 2020 AT 11:05 AM
Tiny
RAFFIEARL
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Hi, I took more pictures and it seems to be leaking at the rear where the join is.
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Wednesday, April 22nd, 2020 AT 12:38 PM
Tiny
RAFFIEARL
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This picture might be better.
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Wednesday, April 22nd, 2020 AT 12:43 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
The pump certainly sounds low on fluid or it is bad. If it is full, I would suggest replacing the pump. Before you replace the pump, we first need to confirm where it is leaking from It looks like you have everything clean at this point. Make sure the fluid is full and start the vehicle and turn all the way in each direction several times and see if you can locate where the leak is located. Once we determine it isn't a hose, I will provide the directions for pump replacement. I don't want you to install a pump only to have it leak and damage it again.

Let me know.

Joe
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Wednesday, April 22nd, 2020 AT 4:15 PM
Tiny
RAFFIEARL
  • MEMBER
  • 12 POSTS
Morning. Did what you suggested. There is a couple pictures one shows the leak. The other one it sure sounds bad. Just a question if I took out all the Lucas Stop Leak and put in fresh clean transmission fluid because it just looks like muddy.
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Thursday, April 23rd, 2020 AT 9:39 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi,

You need to replace the high pressure power steering hose. That is what is leaking. As far as the noise, if you ran it really low on fluid, it may have damaged the pump and the noise may not go away. As far as replacing the fluid because it's dirty, it is a good idea, but I would wait until the leak is repaired. Otherwise, you are going to lose most of what you change when the hose is removed.

I need to ask you for the engine size. It will be on a label under the hood and will be either a 2.8L or a 3.5L. Once I get that, I can explain how to replace that hose. They are different on each engine.

Let me know.

Joe
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Thursday, April 23rd, 2020 AT 5:59 PM
Tiny
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It is an inline 5 3.5 liters. I will take the hose off so I can match it up when I get the new one. I sure appreciate this as the garage quoted me over the phone at worse scenarios replacing pump and hose $550.00 but he hadn't looked at it yet.
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Thursday, April 23rd, 2020 AT 6:17 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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I am going to provide the directions for pump replacement. Take a look through the directions and see if you have questions. The attached pictures correlate with the directions.

__________________________________

2004 GMC Truck Canyon 4WD L5-3.5L VIN 6
Power Steering Pump Replacement
Vehicle Steering and Suspension Steering Power Steering Power Steering Pump Service and Repair Procedures Power Steering Pump Replacement
POWER STEERING PUMP REPLACEMENT
Power Steering Pump Replacement

Removal Procedure

pic 1

1. Remove the air cleaner assembly.
2. Remove the drive belt.
3. Remove the power steering pump pulley.
4. Disconnect the oil pressure sensor harness clip from the pump body.
5. Install a drain pan under the vehicle.
6. Disconnect the power steering pressure hoses from the power steering pump.

pic 2

7. Remove the power steering pump mounting bolts.
8. Remove the power steering pump.

Installation Procedure

pic 3

1. Install the power steering pump.

Notice: Refer to Fastener Notice in Service Precautions.

2. Install the power steering pump mounting bolts.
Tighten the power steering pump mounting bolts to 25 Nm (18 ft. lbs.).

pic 4

3. Connect the power steering pressure hoses to the power steering pump.
Tighten the power steering pressure hose to 25 Nm (18 ft. lbs.).
4. Remove the drain pan from under the vehicle.
5. Connect the oil pressure sensor harness clip to the pump body.
6. Install the power steering pump pulley.
7. Install the drive belt.
8. Install the air cleaner assembly.
9. Bleed the power steering system.
10. Inspect the power steering system for leaks.

________________________

Here is an additional link you may find helpful.

https://www.2carpros.com/articles/remove-reinstall-power-steering-pulley

Let me know if this helps or if you have questions.

Take care,
Joe
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Thursday, April 23rd, 2020 AT 6:44 PM
Tiny
RAFFIEARL
  • MEMBER
  • 12 POSTS
Morning Joe,

Not the news I really wanted to replace the pump. I was in Napa and bought some fluid because I knew I would need it. Asked for a price and he asked is it for pump or reservoir. I thought it was all one piece? I was hoping to just replace the hose.
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Friday, April 24th, 2020 AT 7:25 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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In all honesty, it won't hurt to just replace the hose. You can try and see if it stops the noise. If it doesn't, you can live with the sound for awhile until you have the chance to replace the pump.

As far as the pump/reservoir, they are together on the vehicle. I believe on this vehicle, the reservoir can be removed from the pump. Regardless, if the noise doesn't go away, you need the pump.

Please feel free to let me know if I can help you.

Joe
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Friday, April 24th, 2020 AT 6:35 PM
Tiny
RAFFIEARL
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I am replacing the pump, reservoir and hose. The problem right now is the company sent me a hose for a Z71 where I have a SLE. Waiting for them to bring right hose in. I read some where I need to bleed the Power Steering System, how do I do that?
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Saturday, May 2nd, 2020 AT 10:17 AM
Tiny
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Another thing the truck had been in the garage for about 4 days and I went out in the morning and there was fluid on the drivers side starting from rear tire and going forward to about below where gas tank is. The lead has been on the ground for about 5 to 7 days. If this was a fuel leak would it have not evaporated by now. It doesn't taste like gas but I can not figure what else would be leaking along that line.
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Saturday, May 2nd, 2020 AT 10:33 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

Fuel can cause a stain. If it sat for that long, it may no longer have a odor, or at least not a strong one. Check the brake fluid and make sure it isn't low. You may have a leak in one of the lines.

Let me know.
Joe
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Saturday, May 2nd, 2020 AT 9:03 PM
Tiny
RAFFIEARL
  • MEMBER
  • 12 POSTS
I replaced the pump and hose. My question is, now the hose seems to go back towards the transmission do I have to replace the whole hose or is there a shortcut?
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Friday, May 8th, 2020 AT 12:24 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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That looks like a high pressure hose, so that should be a single unit and not have a second part. Are you sure the hose is the same as the original one? Also, is where it connects at the pump the same. Something has changed if it won't align for you.

Joe
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Saturday, May 9th, 2020 AT 8:29 PM
Tiny
RAFFIEARL
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I have purchased 2 hoses returned the first one because it was for Z71. Getting hold of buddy that helped me to find out were old hose is. It connects to pump okay, but from there I am lost. The company says this is what I need. Like I said I am not a mechanic but this seem to be such an easy job.
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Sunday, May 10th, 2020 AT 12:20 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

The power steering hoses go between the PS pump and the rack and pinion (aka steering gear). I attached two pics below. See if they help you with routing. I highlighted the lines. I will tell you that they are sometimes difficult to route just because of space issues.

Let me know if this helps.

Joe
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Sunday, May 10th, 2020 AT 8:57 PM

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