To answer your question accurately, I need the correct engine displacement (e.g., 2.0L, 2.3L, 2.5L, 3.1L).
Assuming you have one of the more common engines (2.0L, 2.3L, 2.5L, or 3.1L): The 1990 Grand Am did *not* use an oil screen; it used a spin-on oil filter. The location is generally on the driver's side (left side) of the engine block, near the bottom. However, the exact location varies slightly depending on the specific engine.
To find it, you need to:
1. Identify your engine size. This is usually stamped on a metal tag on the engine itself, or you can find it in your owner's manual.
2. Consult a repair manual specific to your year and engine. A Haynes or Chilton manual will have diagrams showing the exact location of the oil filter.
3. Look online for images. Search for "[your engine size] 1990 Pontiac Grand Am oil filter location" on Google Images.
Without knowing the correct engine size, I cannot give you a more precise location. A 25-liter engine is highly improbable for a Grand Am. Double-check your information.
