To be certain:
* Look for the hose connected to the steering gear (the component that actually turns the wheels). The hose leaving this component is the return (low-pressure) line.
* The low-pressure hose will generally be smaller in diameter than the high-pressure line going *to* the steering gear from the pump.
* Trace the lines. Follow the hoses to see where they connect. The one going *back* to the pump is low pressure.
Important Note: Working with power steering systems involves pressurized fluid. Be cautious and consult a repair manual specific to your 1997 Lumina for detailed diagrams and safety precautions before attempting any repairs.
