* The return line itself: This could be a crack, a hole, a loose fitting, or a deteriorated hose. The return line carries power steering fluid *back* to the reservoir, so a leak here will result in fluid loss.
* The reservoir's connection point: The reservoir might have a crack or a damaged fitting where the return line attaches. This is less common than a problem with the line itself.
* The O-ring or seal: There's usually a seal (often an O-ring) at the connection point between the return line and the reservoir. This seal can degrade, become brittle, or get damaged over time, causing a leak. This is a very common culprit.
* The power steering pump itself (less likely): While less probable, a severely worn or damaged power steering pump *could* leak at its connection point, although this usually manifests as a leak from the pump's other connections.
Troubleshooting steps:
1. Clean the area: Thoroughly clean the connection area with a degreaser and a rag. This will allow you to clearly see where the leak is originating.
2. Inspect visually: Carefully examine the return line, the reservoir connection, and the area around them for cracks, holes, or damage. Pay close attention to the area where the line connects to the reservoir.
3. Check for a loose fitting: Make sure the return line is securely attached to the reservoir. If it's a clamp-type connection, ensure the clamp is tight enough.
4. Check the O-ring/seal: If you can easily access it, inspect the O-ring or seal for damage. Replacement is usually inexpensive and relatively easy.
Important Notes:
* Power steering fluid is under pressure: Be extremely careful when inspecting this area, as power steering fluid is under pressure when the engine is running. Never inspect or work on this system with the engine running.
* Fluid type: Use the correct type of power steering fluid for your Cadillac. Using the wrong fluid can damage the system. Consult your owner's manual.
* Professional repair: If you are not comfortable performing these checks and repairs yourself, take your vehicle to a qualified mechanic. Ignoring a power steering fluid leak can lead to serious damage to your power steering system.
