You MUST identify your engine's displacement (e.g., 4.3L, 5.7L) to find the correct location. This information is usually found on a sticker under the hood or in the owner's manual.
Once you know the engine size, you can consult a repair manual specific to your Blazer's engine. A Haynes or Chilton manual will have diagrams showing the exact location.
Generally, the CMP sensor is located on the top or side of the engine block, near the camshaft. It might be near the distributor (if your engine has one) or integrated into the distributor itself (less common on later models). It's usually a small sensor with one or two wires connected to it. It might be held in place with a bolt or clip.
Without knowing the engine size, providing a precise location is impossible. Looking up a repair manual specific to your engine is the safest and most accurate way to find it.
