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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Chevy P12 Chassis 🢒 Steering 🢒 Power Steering System 🢒 Power Steering System Bleeding

Power Steering System Bleeding Process

Important: 

   • When a power steering pump or the gear has been removed or an oil line has been disconnected, the air that has entered the system must be bled out before the vehicle is operated.
   • If air is allowed to remain in the power steering fluid system, noisy and unsatisfactory operation of the system may result.
   • When bleeding the system, and any time the fluid is added to the power steering system, be sure to use only power steering fluid as specified in Fluid and Lubricant Recommendations in Maintenance and Lubrication.

  1. Make sure that the ignition switch is in the unlock position.
  2. Turn the steering wheel to the full left position.

    3. Object Number: 258704 Size: SH
  3. Fill the power steering fluid reservoir to the FULL COLD level. Leave the cap off.
  4. Raise the vehicle using suitable safety stands.
  5. Place a drain pan under the vehicle to catch any power steering fluid that may overflow.
  6. With an assistant checking fluid level and condition, turn the steering wheel end-to-end at least 40 times.
    7. 6.1. Clean off any overflow fluid from the outside of the reservoir to allow for a proper leak check. This overflow is usually caused by trapped air.
    6.2. Maintain the fluid level at the FULL COLD level.
    6.3. Check all power steering hose fittings for leaks if any air bubbles are present.
    6.4. Repair any leaks and repeat step 6.
  7. Start the engine and allow it to idle. Maintain the power steering fluid level at the FULL COLD level.
  8. Install the power steering reservoir cap.
  9. Return the front wheels to the straight ahead position.
  10. Lower the front wheels to the ground.
  11. Fully turn the steering wheel in both directions after allowing the engine to idle for two minutes to verify the following:
    12. • Smooth power assist
    • Noiseless operation
    • Proper fluid level
    • No system leaks
    • Proper fluid condition (no air bubbles, foam, or discoloration)
  12. If any of the problems remain, refer to Power Steering System Bleeding which follows.

Power Steering System Bleeding Special Conditions

Foam or Bubbles in the Power Steering Fluid

The power steering fluid must be completely free of bubbles. Bubbles in the fluid indicate a loose connection or a leaky O-ring seal.

Discolored Fluid (Milky, Opaque, or a Light Tan Color)

If the power steering fluid is discolored, wait two minutes, then recheck the hose connections. Refer to Power Steering System Bleeding and repeat steps 7-11. If the conditions exist, replace the O-ring seals and refer to End Plate and Rotating Group Replacement in Power Steering System. Bleed the system.

Noise (Pump Whine or Groan)

With the engine running, check the hoses for possible contact with the frame, body, or engine. Allow the system to cool down if no contact is found. After cooling, restart the engine and allow it to idle for two minutes to allow the system to come up to operating temperature. Replace the power steering pump if noise is still present. Refer to Power Steering Pump Replacement and repeat the bleeding procedure.