Here's a step-by-step guide:
1. Identify the Pulley: Locate the power steering pump pulley. It's the pulley connected to the power steering pump itself, usually near the front of the engine.
2. Locate and Remove the Belt: Remove the serpentine belt (or V-belt if it's not a serpentine system). Consult your owner's manual or a repair manual for the proper belt routing diagram, if needed. Use a belt wrench or a suitable tool to loosen the tensioner and remove the belt.
3. Remove the Nut: You'll need a socket and wrench (possibly a breaker bar for extra leverage) that matches the nut size on the power steering pump pulley. Important: Before loosening the nut, use a wrench to hold the power steering pump shaft stationary to prevent it from spinning. You might need a wrench that fits the flats of the pump shaft itself. A pulley holding tool is the best way to do this, but if you don't have one, improvise carefully (a large adjustable wrench can sometimes work). If the pump shaft turns while you are trying to loosen the nut you may damage the pump. This is the most important step to get right.
4. Remove the Pulley: Once the nut is off, the pulley should slide off the shaft. If it's stuck, gently tap it from the back with a hammer and a suitable punch or drift. Avoid damaging the shaft or pulley. A puller specifically designed for pulleys might be necessary if it's extremely stubborn. Again, be careful not to damage the pump.
5. Inspect: Inspect the pulley and the shaft for any damage. Replace the pulley if it's damaged.
6. Reassembly: Reassembly is the reverse of the removal process. Make sure the pulley is properly seated on the shaft before tightening the nut. Torque the nut to the manufacturer's specified torque (consult a repair manual for the correct torque specification). Reinstall the serpentine belt according to the routing diagram.
Important Considerations and Tools:
* Repair Manual: A repair manual specific to your 1989 Chevy Suburban R1500 is highly recommended. It will provide detailed diagrams, torque specifications, and other crucial information.
* Socket Set: A complete socket set with various sizes and extensions is essential.
* Wrench Set: A combination wrench set is also necessary.
* Breaker Bar: A breaker bar can provide the extra leverage needed to loosen stubborn nuts.
* Pulley Puller: A pulley puller is a specialized tool that makes removing stubborn pulleys much easier and safer.
* Penetrating Oil (PB Blaster, etc.): Apply penetrating oil to the nut and pulley shaft to help break free any corrosion or rust. Allow it to soak for some time before attempting to remove the nut.
* Torque Wrench: A torque wrench is crucial for tightening the nut to the correct specification, preventing damage to the pump and pulley.
If you're uncomfortable performing this repair yourself, it's best to take your Suburban to a qualified mechanic. Improper removal can damage the power steering pump, leading to costly repairs.
