* Power Steering Pump Failure: This is the most likely culprit. A failing power steering pump can't provide enough hydraulic pressure to assist steering, making it extremely difficult, especially at low speeds when the pump works hardest. You might also hear whining or groaning noises from the pump area.
* Low Power Steering Fluid: Check your power steering fluid level immediately. Low fluid can lead to the same symptoms as a failing pump. If the level is low, you need to find the leak and repair it *before* adding more fluid. Adding fluid to a leaking system won't solve the problem and could make it worse.
* Power Steering Fluid Leak: A leak in the power steering system (hoses, lines, pump seals) will lead to low fluid and hard steering. Inspect all hoses and lines for visible leaks.
* Power Steering Rack and Pinion Problems: Worn or damaged components in the rack and pinion steering system can cause stiff steering. This is less likely to suddenly appear, but wear can worsen over time to a point where it's noticeable.
* Steering Column Issues: Though less common, problems within the steering column itself could contribute to difficult steering. This usually involves binding or internal damage.
* Belt Issues: The power steering pump is belt-driven. A slipping, loose, or broken serpentine belt will prevent the pump from functioning correctly, resulting in hard steering.
What to do:
1. Check the power steering fluid level: This is the first and easiest step. Locate the power steering fluid reservoir (usually a small plastic container with a dipstick). If it's low, don't immediately fill it. Look for leaks first.
2. Inspect for leaks: Carefully examine all power steering hoses, lines, and the pump itself for any signs of fluid leakage.
3. Listen for noises: A whining or groaning noise from the power steering pump area strongly suggests pump failure.
4. Check the serpentine belt: Ensure the belt is properly tensioned and not cracked or worn.
5. If you find a leak or low fluid and are not mechanically inclined: Take your Malibu to a qualified mechanic immediately. Driving with a failing power steering system can lead to further damage and even make the car unsafe to operate. Ignoring the problem could cause significant and expensive repairs later.
Don't attempt to diagnose or repair this yourself unless you have experience working on car steering systems. Power steering fluid is under pressure, and leaks can be dangerous. Safety should be your top priority.
