* Drain Plug (Oil Pan): This is the most common interpretation. The oil drain plug is located on the bottom of the oil pan, underneath the engine. You'll need to get under the car to access it.
* Freeze Plugs (Core Plugs): These are found in various locations on the engine block and cylinder head, sealing off cooling passages. They're usually cylindrical and are *not* typically removed unless there's a problem. Their locations vary depending on the engine.
* Other Plugs: Various other plugs might exist for different sensors, coolant passages, or other components. Without knowing what kind of plug you're looking for, it's impossible to give a precise location.
To find the plug you need, you should specify:
* Year of your Lumina: Different years have different engines.
* Engine type: (e.g., 3.1L V6, 3.4L V6, 3.8L V6, etc.) This information is usually found on a sticker under the hood or in your owner's manual.
* What kind of plug you're looking for: (e.g., oil drain plug, freeze plug, sensor plug)
With this information, you can consult a repair manual specific to your Lumina's year and engine. A repair manual (often available online or at auto parts stores) will have diagrams showing the location of all these plugs.
