Power Steering System: Maintenance GMC Acadia I рестайлинг

Power Steering Fluid Leaks

Special Tools

GE-28431-6 Fluorescent Dye

For equivalent regional tools, refer to Special Tools .

Note. If fluid is found on a manual steering gear or on an electronic power steering gear, do not replace steering gear. Vehicles equipped with these systems do not use hydraulic power steering fluid. The fluid may be assembly fluid or another system fluid. Clean the components and identify the sources of the leaks before attempting to repair or replace any power steering components. Clearly mark all locations of leaks with paint, marker or equivalent for warranty identification and engineering root cause analysis.

Some customers may comment on a fluid LEAK or NOISY power steering pump. Upon inspection, the technician may find power steering fluid leaking from the hydraulic power steering system. Use the following inspection procedure in order to diagnose the source of the leak and take appropriate action to correct the condition.

1. Inspect the fluid level in the power steering fluid reservoir. Refer to «Checking and Adding Power Steering Fluid»(ref-610078-S35396568672014042100000) . If the fluid level is NOT low, a careful analysis of the condition is necessary to confirm that the type of fluid is actually power steering fluid.
2. Visually inspect the power steering system and components where the fluid has accumulated.
3. Use a clean towel or a rag in order to completely clean off all residual fluid from the power steering components. CAUTION: Do not clean using brake cleaner or other reactive solvents as these solvents can damage rubber gaskets, seals and bushings.
4. Add 30 cc (1 oz) of GE-28431-6 dye to the power steering fluid.
5. Start the vehicle and warm the steering system by turning to the left steering stop and to the right steering stop 10 times with the weight of the vehicle on the front tires.
6. Turn vehicle engine OFF.
7. Shine a black light on the area where the residual fluid accumulated. Identify the sources of the leaks.
8. Mark all locations of leaks with paint, marker or equivalent.
9. Repair or replace all affected components.

Rattle, Clunk or Shudder Noise from the Power Steering System

Whine or Growl Noise from the Power Steering System

Checking and Adding Power Steering Fluid

1. Clean the area surrounding the reservoir cap.
2. Remove the reservoir cap.
3. Inspect the power steering pump fluid level at regular intervals. Use the appropriate procedure below. Add fluid when required. Refer to «Fluid and Lubricant Recommendations»(ref-610035-S05460418692014042100000) . Fluid Is Hot Run the engine until the fluid reaches about 80°C (170°F). Turn the engine OFF. Remove the reservoir cap. Inspect the fluid level on the capstick. Ensure that the fluid level is at the HOT/FULL/MAX mark on the capstick.
4. If the fluid level is low, add power steering fluid to the proper level.
5. Install the reservoir cap.
6. When checking the fluid level after servicing the steering system, bleed the air from the system. Refer to «Power Steering System Bleeding»(ref-610078-S10880459592014042100000) .

Scheme 39

1. Ensure the engine is OFF.
2. Apply the park brake.
3. Using a floor jack and jack stands, raise the front of the vehicle until the center of the front wheels are approximately 61 cm (24 in) off the ground. Refer to «Lifting and Jacking the Vehicle»(ref-610031-S32962375812014042100000) .
4. Place a large container under the vehicle in order to collect the draining fluid. NOTE: Do not reuse any drained power steering fluid regardless of appearance or condition.
5. Loosen the hose clamp (1) and disconnect the power steering fluid reservoir inlet hose from the power steering fluid reservoir.
6. Plug the power steering fluid reservoir inlet port.
7. With the key ON and the engine OFF, turn the steering wheel fully to the left and to the right while an assistant maintains the minimum fluid level in the reservoir using NEW approved power steering fluid. Refer to «Fluid and Lubricant Recommendations»(ref-610035-S05460418692014042100000) . NOTE: This step may require 4 L (4 qt) of power steering fluid until the draining fluid appears clear. Continue until the fluid from the power steering fluid reservoir inlet hose runs clear.
8. Remove the plug from the power steering fluid reservoir inlet port.
9. Connect the power steering fluid reservoir inlet hose to the reservoir. Secure the hose with the clamp.
10. Fill and bleed the power steering system. Refer to «Power Steering System Bleeding»(ref-610078-S10880459592014042100000) . NOTE: Do NOT start the engine without the power steering fluid at a minimum system level.
11. Inspect the power steering fluid for the following indications of contamination: Milky fluid - water Brown fluid - burnt Plastic debris or dirt chunks
12. If the fluid is contaminated, repeat steps 5 through 11 .
13. Ensure there are no power steering fluid leaks.
14. Lower the vehicle.

Scheme 40

Scheme 41

1. Remove the fuel injector sight shield. Refer to «Fuel Injector Sight Shield Replacement»(ref-610074-S40770128942014042100000) .
2. Remove as much power steering fluid from the remote power steering fluid reservoir as possible.
3. Place drain pans under the vehicle as needed.
4. Compress the power steering reservoir inlet hose clamp (1) and disconnect the hose from the remote power steering fluid reservoir.
5. Compress the power steering fluid reservoir outlet hose clamp (1) and disconnect the hose from the remote power steering fluid reservoir.
6. Remove the remote power steering fluid reservoir bolts (1).
7. Remove the remote power steering fluid reservoir (2).