GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Yukon Denali 🢒 Steering 🢒 Power Steering System 🢒 Checking and Adding Power Steering Fluid
  1. Keep the power steering system clean. Check the power steering pump fluid level at regular intervals. Add fluid when required. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.
  2. Flush any dirt from the system. Refer to Power Steering System Flushing . If the system is exceptionally dirty, disassemble the pump and the gear before further usage.
  3. Inspect all of the tubes, the hoses, and the fittings for leakage at regular intervals. The fittings must be tight. Ensure the clips, the clamps, the supporting tubes, and the hoses are in place and properly secured.
  4. Inspect the hoses with the wheels in the straight-ahead position. Turn the wheels fully to the left and the right while observing the movement of the hoses. Correct any hose contact with the other parts of the vehicle that could cause chafing or wear.
  5. The power steering hoses and the pipes must not be twisted, kinked, or tightly bent. The hoses should have sufficient natural curvature in the routing in order to absorb the movement and the hose shortening during the vehicle operation.
  6. Air in the system will cause spongy action and noisy operation. When a hose is disconnected or when fluid is lost for any reason, bleed the system after refilling. Refer to Power Steering System Bleeding .
  7. The fluid level may be checked hot or cold. In order to check the fluid level when HOT, perform the following steps:
    8. 7.1. Run the engine until the fluid reaches about 80°C (170°F).
    7.2. Shut the engine OFF.
    7.3. Remove the reservoir cap.
    7.4. Check the fluid level on the dipstick.
    7.5. The fluid level should be between the HOT/FULL and the COLD/FULL marks on the dipstick.
  8. If the fluid level is being checked COLD, perform the following steps:
    9. 8.1. Remove the reservoir cap.
    8.2. Check the fluid level on the dipstick.
    8.3. The fluid level should be between the bottom of the COLD/FULL mark and the end of the dipstick.
  9. If the fluid level is low, add the power steering fluid to the proper level. Refer to Fluid and Lubricant Recommendations .
  10. Install the reservoir cap.
  11. When checking the fluid level after the steering system has been serviced, bleed the air from the system. Refer to Power Steering System Bleeding .