If your Cutlass Ciera is from the very early 1980s (possibly 1980-1982, depending on the engine option), then it *might* have a carburetor. Even then, it's difficult to give a precise location without knowing the exact year and engine type. Carburetors are usually located on top of the engine, but their position can vary slightly.
To find out if you have a carburetor and its location:
1. Check your owner's manual: This is the best source for information specific to your vehicle's year and model.
2. Look up your engine code: The engine code (often a series of letters and numbers) is usually found on a sticker under the hood or on the engine itself. Use this code to search online for diagrams or information specific to that engine.
3. Visually inspect the top of the engine: If you have a carburetor, it will be a relatively large, somewhat boxy component atop the engine. It will have various hoses and linkages connected to it.
If you can't find a carburetor, it's virtually certain that your vehicle uses fuel injection.