Tools You'll Likely Need:
* Socket set (metric): Various sizes, including deep sockets.
* Wrench set (metric): Open-end and/or combination wrenches.
* Ratchet: A good quality ratchet will make the job easier.
* Torque wrench: Essential for proper tightening to avoid damage.
* Power steering fluid: Dexron III or equivalent, and a funnel.
* Drain pan: To catch old fluid.
* Jack and jack stands: To safely lift the vehicle.
* Wheel chocks: For safety.
* Gloves: To protect your hands.
* Clean rags or shop towels: To clean up spills.
* Possibly a pry bar or a special power steering pulley puller: Depending on how stubborn the pulley is.
Steps:
1. Safety First: Disconnect the negative battery cable. Place the vehicle on jack stands after securely lifting it with a jack. Engage the parking brake and use wheel chocks.
2. Drain Power Steering Fluid: Locate the power steering fluid reservoir and carefully drain the fluid into a drain pan.
3. Access the Pump: The power steering pump is typically located on the front of the engine, driven by the crankshaft pulley (or a separate pulley driven by the crankshaft). You'll likely need to remove some components for access:
* Remove the serpentine belt: Use a belt tensioner tool to release tension on the belt and remove it. Take note of the belt routing.
* Remove the power steering pump pulley: This often requires a pulley puller. Some pulleys can be removed with a strong puller and a few taps with a hammer (use caution to avoid damaging the pump).
4. Disconnect the Lines: There will be high-pressure and low-pressure lines connected to the power steering pump. Carefully loosen the lines with wrenches, using rags to catch any drips. Be prepared for some fluid to spill out even after draining the reservoir.
5. Remove the Pump: Once the lines and pulley are disconnected, carefully remove the pump mounting bolts. The pump may be a bit stubborn; gently pry it loose if needed.
6. Install the New Pump: Install the new pump in reverse order of removal, ensuring the lines and pulley are properly seated and aligned. Tighten bolts to the manufacturer's specified torque.
7. Reconnect the Lines: Attach the high-pressure and low-pressure lines, making sure they are securely tightened to the correct torque.
8. Install the Pulley: Install the power steering pump pulley. If you used a puller, you may need a similar tool to install the pulley.
9. Install the Serpentine Belt: Reinstall the serpentine belt, following the correct routing diagram.
10. Add Power Steering Fluid: Carefully add new power steering fluid to the reservoir, checking the level frequently and topping it off as needed.
11. Bleed the System (Important): After installing the new pump, you may need to bleed the air from the power steering system. This often involves turning the steering wheel from lock to lock several times with the engine running (check your repair manual for the specific procedure).
12. Check for Leaks: After reinstalling everything, thoroughly check for leaks around the pump, lines, and pulley. Run the engine to confirm proper operation.
13. Reconnect the Battery: Reconnect the negative battery cable.
Important Considerations:
* Repair Manual: As mentioned earlier, this is crucial. The exact procedure may vary slightly depending on your specific Suburban model.
* Fluid Type: Use the correct type of power steering fluid.
* Torque Specifications: Use a torque wrench to tighten all bolts and fittings to the manufacturer's specifications to avoid damage.
This is a general guide. If you are not comfortable performing this repair yourself, it's best to take your Suburban to a qualified mechanic. Improper installation can lead to damage to the power steering system or even serious injury.
