Here's a general outline of the steps involved. Remember, this is a simplified overview and may not cover all variations or potential complications:
1. Preparation:
* Safety First: Disconnect the negative battery terminal. Wear safety glasses and gloves.
* Gather Tools: You'll need a variety of tools, including wrenches (metric), sockets, a power steering pump pulley puller, a fluid catch pan, new power steering fluid, and possibly a torque wrench. A shop manual will list all necessary tools.
* Jacking and Support: Securely jack up the vehicle and support it on jack stands. Consult your owner's manual for proper jacking points.
2. Accessing the Pump:
* Remove Related Components: Depending on the exact location of the pump, you may need to remove or loosen various components to gain access, such as the serpentine belt, belt tensioner, and possibly other ancillary components. The specific steps will vary significantly depending on the engine.
* Drain Power Steering Fluid: Locate the power steering fluid reservoir and drain the fluid into a catch pan.
3. Removing the Old Pump:
* Disconnect Lines: Carefully disconnect the power steering pressure and return lines. Be prepared for some fluid spillage. You might need line wrenches to avoid damaging the lines. Note which line goes where!
* Remove the Pulley: Use a pulley puller to remove the power steering pump pulley. This can be tricky; improper removal can damage the pump or pulley.
* Remove Mounting Bolts: Unbolt the power steering pump from its mounting bracket.
4. Installing the New Pump:
* Install New Pump: Install the new power steering pump, ensuring it's properly seated.
* Install Pulley: Carefully install the pulley, ensuring it's aligned correctly.
* Reconnect Lines: Connect the power steering pressure and return lines. Tighten them securely to the specifications in your repair manual.
* Reinstall Components: Reinstall any components you removed earlier, such as the serpentine belt and tensioner.
5. Bleed the System and Refilling:
* Refill Reservoir: Add new power steering fluid to the reservoir, checking the level frequently.
* Bleed the System: There are different ways to bleed a power steering system. Your repair manual will describe the proper procedure. This is essential to remove air bubbles from the system, which can damage the pump. Often, you'll need to turn the steering wheel lock to lock several times while monitoring the fluid level.
6. Final Checks:
* Check for Leaks: Carefully inspect all connections for leaks.
* Test Drive: Take the vehicle for a test drive to ensure the power steering is functioning correctly.
Disclaimer: This is a general guideline only. Incorrect procedures can result in damage to your vehicle or personal injury. Always consult a repair manual specific to your 2005 Cadillac Escalade ESV for detailed instructions and safety precautions. If you are not comfortable performing this repair yourself, take your vehicle to a qualified mechanic.
