How To: Flush your Power Steering Fluid - Chevy Colorado & GMC Canyon

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Old 04-26-2009, 01:01 PM   #1 (permalink)
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Default How To: Flush your Power Steering Fluid

Disclaimer: "Please use caution and seek professional assistance when necessary. ColoradoFans.com, myself and all associated members are not responsible for any damages, injuries or other harm which may occur with this modification. This post does not reflect the views of ColoradoFans.com and it's ownership." Before attempting any modification it is advised that you refer to your Colorado or Canyon service manual or contact a certified mechanic as not all GMT355 trucks are the same.



Skill Level: Easy

Project Description: How-to flush your power steering fluid

Project Vehicle:
Make: GMC
Model: Canyon
Year: 2007
Engine: 3.7L
Body Lift: Yes

Tools Needed:
Channel locks and/or pliers
3/8" clear tubing - roughly 12" or so
3/8" barbed fitting capped on the end
3/8" clear tubing - roughly 3 4 ft or so
3/8" barbed fitting on both ends
Milk jug
Drain pan
Power steering fluid (full system capacity approximately +/- 48 fluid oz or so)
Hydraulic lift

Project Time: 1 hour or so

Project Cost: ~$30 - $40 total give or take

Project Procedure:
Step 1 - Locate the power steering pump and fluid reservoir.


Step 2 - Take your short piece of 3/8" tubing, insert the barbed fitting and cap the end. (Bottom)


Step 3 - Take your long piece of 3/8" tubing and insert the double barbed end fitting at one end. (Top)


Step 4 - Locate the metal supply and rubber return lines on the steering pump reservoir.


Step 5 - With a drain pan under the truck, disconnect the rubber return line and quickly slide the short piece of 3/8" tubing capped on the end over the return connection on the bottom of the pump/reservoir. This section of tubing will fill up with the old steering fluid in the reservoir. If you have had your truck 2 or more years and have never changed your power steering fluid then it will probably look dirty but that is why you are flushing it. Picture below is with the tubing sticking out under the fender wheel well. The fluid color in the bottle was not accurately shown in the picture so I photoshopped the fluid in a syringe for a better representation. Only 2 years on the steering fluid in the truck and as you can see it was almost black.


Step 6 - Quickly slide the long piece of 3/8" tubing with the double barbed fitting and slide it over the other end of the return hose tubing. Put the end of tubing with no fitting into a milk jug or other container to catch the old fluid.


Step 7 - Take the cap off the steering pump reservoir and lift the front of the vehicle up where the tires are off the ground.


Step 8 - Turn the steering wheel a few cycles back and forth to pump the old fluid out of the system. It does not take many turns. Continue to do this till the fluid starts to spit and sputter.


Step 9 Add new fluid to the reservoir and turn the steering wheel a few cycles back and forth to pump the new fluid thru the system. Continue to do this till you see new fluid starts to come out of the tubing. The fluid will continue to lighten up as you flush the old fluid out. Do this till you are satisfied that old fluid is flushed out enough.


Step 10 - Quickly disconnect the long tubing from the return line, short piece of 3/8" tubing capped on the end and reconnect the existing rubber return line to the bottom of the steering pump reservoir.


Step 11 - Turn the steering wheel a few cycles back and forth to pump the fluid thru the system. Lower the vehicle and check the amount of fluid in the steering pump reservoir. Add as needed.

Step 12 - Again lift the front of the vehicle where the tires are off the ground and turn the steering wheel a few cycles back and forth to pump the fluid thru the system.

Step 13 - Lower the vehicle and re-check the amount of fluid in the steering pump reservoir. Add as needed. Repeat steps 11 and 13 until the fluid in the reservoir is within the acceptable range.

Step 14 - DONE! Drive the vehicle for a day or so and recheck. Add fluid as needed.
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2007 GMC Canyon Z71-4x4 Crew Cab | 3.7 I5 - Auto | 4" Skyjacker suspension lift | 3" Performance Accessories body lift | 33x11.5x17 tires (going 35x12.5x17) | 3.73 gears | Custom blurred grille | 57 K&N | BPi VS | AMS EaAU 6081 | SSK MAF Adapter | NGK AFX w/ NTK WBO2 | HP Tuner Pro wideband tuned by ME! | AMSoil fluids FTW!
............2010 SESM Oct 22-24 Details Here
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Old 05-29-2009, 06:06 PM   #2 (permalink)
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Default Re: How To: Flush your Power Steering Fluid

Nice writeup... do you do this with the engine on to turn the pump?
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2001 Quicksilver Z06 - NASA TTA racecar
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Old 05-29-2009, 10:21 PM   #3 (permalink)
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Default Re: How To: Flush your Power Steering Fluid

Engine off. As you turn the wheels left and right, fluid will manually flow through the system.
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2005 Z71 LS Crew Cab 4X4 L52, 4L60E, GT4, Silver Birch Metallic MAXX Shackles: http://www.355nation.net/forum/suspe...here-here.html MAXX Cam JR Lift Kit for 4X4 & 2WD Z71: http://www.355nation.net/forum/suspe...ering-kit.html
MAXX Stak Lift Kit for 2WD: http://www.355nation.net/forum/suspe...t-numbers.html PerforMAXX Body Lift: http://www.355nation.net/forum/suspe...y-spacers.html
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Old 05-30-2009, 08:33 AM   #4 (permalink)
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Default Re: How To: Flush your Power Steering Fluid

Thanks
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2001 Quicksilver Z06 - NASA TTA racecar
2003 Torch Red/Tan Corvette Convertible
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Old 05-30-2009, 10:32 AM   #5 (permalink)
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Default Re: How To: Flush your Power Steering Fluid

Yep, engine off.
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Steve
2007 GMC Canyon Z71-4x4 Crew Cab | 3.7 I5 - Auto | 4" Skyjacker suspension lift | 3" Performance Accessories body lift | 33x11.5x17 tires (going 35x12.5x17) | 3.73 gears | Custom blurred grille | 57 K&N | BPi VS | AMS EaAU 6081 | SSK MAF Adapter | NGK AFX w/ NTK WBO2 | HP Tuner Pro wideband tuned by ME! | AMSoil fluids FTW!
............2010 SESM Oct 22-24 Details Here
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Old 05-02-2010, 11:23 PM   #6 (permalink)
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Default Re: How To: Flush your Power Steering Fluid

I just did this today and it works well. Its just the GM power steering fluid is clear and its really hard to get nice clear fluid coming through it. Eventually clear fluid came out but then after driving it, looking at the resivour the stuff is all brown again. So going to do it again.
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2004 GMC Gas guzzling canyon SLE wit 20 inch chrome rims (Used to have), small lift in front, grille, 5% tint all around, running boards, rhino lining, splash guard, AEM brute force intake, gts smoke headlight covers and tail light covers
a vid of my truck with old chrome rims
http://s15.photobucket.com/albums/a369/ ... canyon.flv

Now: Same with 32 inch All Terrain BFG's and 15 inch steel wheels.
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