Where is the crankshaft sensor located on a 3800 series engine 04 impala?

On a 2004 Impala with the 3800 Series II engine, the crankshaft position sensor (CKP sensor) is typically located on the passenger side of the engine block, near the rear of the engine. It's often near the bell housing (where the transmission connects to the engine).

However, to be absolutely certain, you should:

* Consult your repair manual: A Haynes or Chilton manual specific to your 2004 Impala will show the exact location with a diagram.

* Use an online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to look up diagrams of your specific vehicle's engine. Search for your vehicle and find the diagrams; the CKP sensor should be clearly identified.

Looking at diagrams is strongly recommended, as slight variations in location are possible depending on specific engine sub-type and minor year-to-year differences. Don't rely solely on general descriptions.