Contents Wiring diagrams Section: Electronic Steering All sections

Power Steering System: Maintenance GMC Acadia I

Electronic Steering ~325 words

Power Steering Fluid Leaks

StepActionYesNo
1Did you review the Power Steering System General Description and perform the necessary inspections?Go to Step 2Go to Steering Wheel and Column Description and Operation
2Verify that power steering fluid leaks are present. Is the power steering system leaking?Go to Step 3System OK
3Inspect the power steering system fittings. Are the fittings leaking?Go to Step 8Go to Step 4
4Inspect the power steering hoses. Are the hoses leaking?Go to Step 9Go to Step 5
5Inspect the power steering sensors. Are the sensors leaking?Go to Step 10Go to Step 6
6Inspect the power steering pump, shaft seal, and the remote power steering fluid reservoir for leaks. Is the power steering pump, shaft seal, or the remote power steering fluid reservoir leaking?Go to Step 11Go to Step 7
7Inspect the steering gear for leaks. Is the steering gear leaking?Go to Step 12Go to Step 8
8Tighten the fittings. Refer to Fastener Tightening Specifications . Did you complete the repair?Go to Step 13
9Replace the power steering hoses. Refer to the appropriate procedures: Power Steering Cooler Pipe/Hose Replacement Power Steering Fluid Reservoir Inlet Hose Replacement Power Steering Fluid Reservoir Outlet Hose Replacement Power Steering Gear Inlet Pipe/Hose Replacement Power Steering Gear Outlet Pipe/Hose Replacement Did you complete the repair?Go to Step 13
10Replace the power steering sensors. Did you complete the repair?Go to Step 13
11Replace the power steering pump, shaft seal, or remote power steering fluid reservoir. Refer to the appropriate procedures: Power Steering Pump Replacement Power Steering Fluid Reservoir Replacement Did you complete the repair?Go to Step 13
12Replace the steering gear. Refer to Steering Gear Replacement . Did you complete the repair?Go to Step 13
13Operate the system in order to verify the repair. Did you correct the condition?System OKGo to Step 3
StepActionYesNo
1Did you review the Power Steering System General Description and perform the necessary inspections?Go to Step 2Go to Symptoms - Power Steering System
2Verify that a rattle, clunk or shudder noise is present. Is a rattle, clunk or shudder noise present?Go to Step 3System OK
3Inspect the power steering hoses for proper routing and clearance. Is the routing or clearance of the power steering hoses incorrect?Go to Step 10Go to Step 4
4Inspect the engine drive belt for excessive wear. Refer to Drive Belt Falls Off and Excessive Wear Diagnosis . Is the drive belt cracked or excessively worn?Go to Step 11Go to Step 5
5Inspect the power steering pump pulley for damage. Is the power steering pump pulley damaged?Go to Step 12Go to Step 6
6Inspect the power steering pump for the proper installation. Refer to Power Steering Pump Replacement . Is the power steering pump installation incorrect?Go to Step 13Go to Step 7
7Inspect the steering gear for the proper installation. Refer to Steering Gear Replacement . Is the power steering gear installation incorrect?Go to Step 14Go to Step 8
8Inspect the suspension. Is the suspension worn?Go to Step 15Go to Step 9
9Inspect the intermediate shaft. Is the intermediate shaft worn?Go to Step 16Go to Step 3
10Adjust or replace the hoses. Refer to the appropriate procedure(s): Power Steering Cooler Pipe/Hose Replacement Power Steering Fluid Reservoir Inlet Hose Replacement Power Steering Fluid Reservoir Outlet Hose Replacement Power Steering Gear Inlet Pipe/Hose Replacement Power Steering Gear Outlet Pipe/Hose Replacement Did you complete the repair?Go to Step 17
11Replace the engine drive belt. Refer to Drive Belt Replacement . Did you complete the repair?Go to Step 17
12Replace the power steering pump pulley. Refer to Power Steering Pump Pulley Replacement . Did you complete the repair?Go to Step 17
13Install the power steering pump correctly. Refer to Power Steering Pump Replacement . Did you complete the repair?Go to Step 17
14Install the steering gear correctly. Refer to Steering Gear Replacement . Did you complete the repair?Go to Step 17
15Replace the worn suspension components. Did you complete the repair?Go to Step 17
16Replace the intermediate shaft. Refer to Intermediate Steering Shaft Replacement . Did you complete the repair?Go to Step 17
17Operate the system in order to verify the repair. Did you correct the condition?System OKGo to Step 3
StepActionYesNo
1Did you review the Power Steering System Description and perform the necessary inspections?Go to Step 2Go to Steering Wheel and Column Description and Operation
2Verify that a whine or growl noise is present. Is a whine or growl noise present?Go to Step 3System OK
3Inspect the power steering fluid for the following indications of contamination: Milky fluid - water Brown Fluid - burnt Debris in fluid - plastic or dirt Is the fluid free of contamination?Go to Step 5Go to Step 4
4Flush the power steering system. Refer to Power Steering System Flushing . Did you complete the procedure?Go to Step 11Go to Step 5
5Using the J 39570 Chassis Ear, inspect the power steering gear for a whine or growl noise. Is the noise present at the power steering gear?Go to Step 8Go to Step 6
6Using the J 39570 , inspect the power steering pump for a whine or growl noise. Is the noise present at the power steering pump?Go to Step 9Go to Step 7
7Using the J 39570 , inspect the power steering hoses for a whine or growl noise. Is the noise present at the power steering hoses?Go to Step 10Go to Step 2
8Replace the steering gear. Refer to Steering Gear Replacement . Did you complete the repair?Go to Step 11
9Replace the power steering pump. Refer to Power Steering Pump Replacement . Did you complete the repair?Go to Step 11
10Adjust the routing of the power steering hoses. Did you complete the repair?Go to Step 11
11Operate the system in order to verify the repair. Did you correct the condition?System OKGo to Step 3

Checking and Adding Power Steering Fluid

CAUTIONWhen adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.
  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 (USA and Canada)»(ref-365291-S01330376382010070600000) . 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-365269-S06132857992010070600000) .
IMPORTANTDo not reuse any drained power steering fluid regardless of appearance or condition.
  1. Turn OFF the engine.
  2. Raise the front end of the vehicle off the ground until the tires and wheels turn freely. Refer to «Lifting and Jacking the Vehicle»(ref-365243-S07204316382010070600000) .
  3. Place a large container under the fluid return hose in order to collect the draining fluid.
  4. Remove the fluid return hose at the power steering pump reservoir inlet connection.
  5. Plug the reservoir return hose inlet connection on the power steering reservoir.
  6. With the key on 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. Continue until the fluid from the return hose runs clear.
  7. Remove the plug from the pump reservoir inlet connection and install the fluid return hose to the pump reservoir.
  8. Bleed the power steering system. Refer to «Power Steering System Bleeding»(ref-365269-S06132857992010070600000) .
  9. Inspect the power steering fluid for the following indications of contamination: Milky fluid - water Brown fluid - burnt Plastic debris or dirt chunks
  10. If the fluid is contaminated, repeat steps 2-9.
  11. Lower the vehicle and check the Power Steering system for leaks.