Here's a general overview of the process, but remember this is *not* a substitute for a proper repair manual:
1. Preparation:
* Safety First: Disconnect the negative battery terminal to prevent electrical shorts. Use jack stands to securely support the vehicle after lifting it. 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 drain pan, rags, new power steering fluid, and possibly a torque wrench.
* Fluid Drain: Locate the power steering fluid reservoir and carefully drain the fluid into your drain pan. There might be a drain plug or you might need to siphon the fluid out.
2. Accessing the Power Steering Pump:
* Removal of Accessories: Depending on your Venture's engine configuration (3.1L V6 or 3.4L V6), you may need to remove or loosen other components to access the pump. This could include:
* Serpentine Belt: This is almost certainly necessary. Use the proper tools to remove the belt tensioner and remove the belt. Diagram your belt routing before removal so you can reinstall it correctly.
* Other Components: There might be hoses or brackets obstructing access to the pump. Refer to your repair manual for specifics.
3. Removing the Power Steering Pump:
* Disconnect Hoses: Carefully disconnect the high-pressure and low-pressure power steering hoses. Be prepared for some fluid spillage, even after draining the reservoir. Use rags to absorb any spills. Note the hose routing.
* Remove Mounting Bolts: The power steering pump is typically bolted to the engine block. Use the appropriate wrenches or sockets to remove these bolts.
* Remove Pulley: Use a pulley puller to remove the pulley from the pump shaft. This is often the most difficult part and requires the correct tool to avoid damage.
4. Installing the New Power Steering Pump:
* Install Pulley (if necessary): If your new pump doesn't come with the pulley, carefully install the old pulley onto the new pump using the correct tool.
* Install the Pump: Install the new pump in reverse order of removal, ensuring it's correctly aligned. Tighten the mounting bolts to the manufacturer's specified torque.
* Reconnect Hoses: Carefully reconnect the high-pressure and low-pressure hoses, ensuring tight connections to prevent leaks.
* Reinstall Belt and Accessories: Reinstall the serpentine belt following your diagram or the repair manual. Reinstall any other components you removed.
5. Refilling and Bleeding:
* Refill Reservoir: Add the correct type and amount of power steering fluid to the reservoir. Consult your owner's manual for the proper fluid type.
* Bleed the System: This step is crucial to remove air bubbles from the system. The method varies depending on the vehicle. Your repair manual will provide instructions, often involving turning the steering wheel lock-to-lock while the engine runs.
6. Testing:
* Check for Leaks: Carefully inspect all connections for leaks.
* Test Steering: Start the engine and check for proper steering operation. The steering should be smooth and responsive.
Disclaimer: This is a general overview. Improperly completing this repair could result in damage to your vehicle or injury. Always consult a repair manual specific to your 1999 Chevy Venture before attempting this repair. If you're not comfortable with this level of vehicle repair, it's best to take your Venture to a qualified mechanic.
