Where is the engine coolant temperature sensor on a 2004 impala?

The Engine Coolant Temperature (ECT) sensor on a 2004 Chevrolet Impala is typically located on the engine block, near the thermostat housing. However, the exact location can vary slightly depending on the engine (3.4L, 3.8L, or 5.3L).

To be sure, you should:

1. Consult your vehicle's repair manual: This will have a diagram showing the precise location of the sensor for your specific engine.

2. Use a reliable online parts diagram: Many websites (like auto parts store sites) allow you to select your year, make, and model to view diagrams of your engine bay. Look for "ECT sensor" or "Coolant Temperature Sensor".

Without a diagram specific to your engine, searching blindly could lead to wasted time. Using one of the above methods is strongly recommended to avoid misidentification and potential damage.