* Power Steering Pump: This is the most frequent offender. Leaks can occur from the pump's seals, shaft seal, or pressure line connection. Look for fluid around the pump itself.
* Power Steering Hoses: These hoses carry the fluid between the pump, rack and pinion (or steering gear), and the reservoir. Cracks, holes, or loose clamps can lead to leaks. Inspect the entire length of each hose, paying close attention to the connections.
* Rack and Pinion (or Steering Gear): Seals within the rack and pinion can wear out, causing leaks. This often manifests as fluid leaking near the steering rack, usually at the ends or around the boot.
* Power Steering Reservoir: Although less common, cracks or a damaged cap on the reservoir can allow fluid to escape.
* Pressure Line Fittings: The metal lines connecting the pump and rack can develop leaks at the fittings (where the lines connect to the components). Look for wetness around these connections.
* Return Line Fittings: Similar to the pressure lines, the return lines can also leak at the fittings.
To diagnose the leak:
1. Locate the leak: Start the engine (briefly), then carefully inspect the entire power steering system for wet spots, fluid trails, or dripping fluid. Use a flashlight and a clean rag if necessary to help pinpoint the source.
2. Check the fluid level: If the reservoir is low, it confirms a leak.
3. Inspect the hoses and lines: Squeeze the hoses gently to check for softness or swelling, which may indicate weakening. Look closely for any cracks, bulges, or damaged clamps.
4. Inspect the pump and rack: Look for evidence of fluid around these components.
Important Note: Power steering fluid is messy and can damage paint. If you're not comfortable diagnosing and repairing this yourself, it's best to take your Malibu to a qualified mechanic. Driving with a significant power steering fluid leak can damage the power steering pump and make steering difficult or impossible.
