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The low pressure port on a Buick Lucerne is typically located on the larger diameter aluminum tubing that connects the AC compressor to the evaporator core. It is usually found near the front of the engine bay, often on the passenger side. To identify it easily, look for a port with a blue or black cap, which is smaller than the high pressure port. Always ensure the engine is off before attempting to connect or disconnect any AC lines.

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2mo ago

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