Where is a crankshaft sensor on 1997 Chevrolet Lumina and what does it look like?

The crankshaft position sensor (CKP sensor) on a 1997 Chevrolet Lumina is typically located on the engine block, near the crankshaft pulley, but its exact position can vary slightly depending on the engine (3.1L V6 or 3.4L V6). It's usually mounted somewhere on the engine block facing towards the crankshaft pulley.

What it looks like:

The CKP sensor is generally a small, cylindrical component with a single wire connector. It has a tip that's very close to the crankshaft's reluctor wheel (a toothed wheel that produces a signal). This tip contains a magnetic pickup or a hall-effect sensor that detects the teeth passing by. It will likely have a single electrical connector plugged into it. The sensor itself might be mounted in a bracket or directly screwed into the engine block.

To locate it with certainty:

1. Consult a repair manual: A repair manual specific to your 1997 Chevrolet Lumina's engine (3.1L or 3.4L V6) is your best bet. It will have diagrams showing the sensor's precise location.

2. Use an online parts diagram: Many online auto parts stores (like AutoZone, Advance Auto Parts, etc.) have diagrams. Enter your vehicle's year, make, model, and engine size. Find the engine diagram, and look for a component labeled "Crankshaft Position Sensor" or "CKP Sensor."

3. Visual Inspection (with caution): After consulting a diagram, carefully inspect the area near the crankshaft pulley, looking for a sensor matching the description above. Be aware that hot engine components can cause serious burns. Let the engine cool down completely before attempting this.

Remember safety first! Working on your car's engine can be dangerous. If you're not comfortable performing this task yourself, it's best to take your car to a qualified mechanic.