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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 218 (Power Steering System) >> Diagnostic Information & Procedures >> Power Steering Fluid Leaks

Power Steering Fluid Leaks

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Step Action Yes No
1 Did you review the Power Steering System General Description? Go to Step 2  Go to Power Steering System Description and Operation (HPS)  or Power Steering System Description and Operation (EPS) 
2 Inspect the power steering system for the following:
  • Inspect the power steering fluid level and condition.
  • Inspect for aftermarket devices which could affect the operation of the power steering system.
  • Inspect the power steering system components for obvious damage or conditions which could cause leaks.
  • If necessary, clean the power steering system components, start the engine, and rotate the steering wheel from stop to stop. Turn the engine off and inspect all power steering system components for leaks.

Is the power steering system leaking?		 Go to Step 3  Go to Step 15 
3 Inspect the power steering system fittings.
Are the fittings leaking?		 Go to Step 9  Go to Step 4 
4 Inspect the power steering hoses.
Are the hoses leaking?		 Go to Step 10  Go to Step 5 
5 Inspect the following power steering pump components for leaks:
  • Flow control valve seal
  • Power steering pump shaft seal
  • Power steering pump reservoir and seals
  • Power steering pump

Is the power steering pump components leaking?		 Go to Step 11  Go to Step 6 
6 Inspect the following power steering gear components for leaks:
  • Power steering cylinder lines and/or seals
  • Power steering gear stub shaft seals
  • Power steering gear pitman shaft and/or seals

Is the power steering gear components leaking?		 Go to Step 12  Go to Step 7 
7 Inspect the power steering cooler for leaks.
Is the power steering cooler leaking?		 Go to Step 13  Go to Step 8 
8 Inspect the hydraulic brake booster assembly for leaks. Refer to Hydraulic Brake Booster Leak Inspection .
Is the hydraulic brake booster assembly leaking?		 Go to Step 14  Go to Step 15 
9
IMPORTANT: If fitting is still to leaking after tightening, inspect for damage to the fitting and seals. Replace the damaged component as necessary.
Tighten the fittings. Refer to Fastener Tightening Specifications .Did you complete the repair?		 Go to Step 15  -
10 Replace the power steering hoses. Refer to the appropriate procedure(s):
Did you complete the repair?		 Go to Step 15  -
11 Replace the leaking power steering pump component. Refer to the appropriate procedure(s):
Did you complete the repair?		 Go to Step 15  -
12 Replace the leaking power steering gear component. Refer to the appropriate procedure(s):
Did you complete the repair?		 Go to Step 15  -
13 Replace the power steering fluid cooler. Refer to Power Steering Fluid Cooler Replacement (with Hydroboost)  or Power Steering Fluid Cooler Replacement (without Hydroboost) .
Did you complete the repair?		 Go to Step 15  -
14 Replace the hydraulic brake booster assembly. Refer to Power Brake Booster Replacement .
Did you complete the repair?		 Go to Step 15  -
15 Start the vehicle and rotate the steering wheel from stop to stop and verify the system is not leaking.
Did you correct the condition?		 System OK Go to Step 2 
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