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Where is the Engine Coolant Temperature Sensor located on a 2003 Chevy suburban?

The Engine Coolant Temperature (ECT) sensor on a 2003 Chevy Suburban is typically located on the engine block, near the thermostat housing. However, the exact location can vary slightly depending on the engine (e.g., 4.8L, 5.3L, 6.0L).

To find it, you'll need to:

1. Consult your vehicle's repair manual: This is the most reliable way to locate the sensor. The manual will have diagrams showing the exact location.

2. Look near the thermostat housing: This is the most common location. The sensor is usually a single-wire or two-wire sensor screwed into the engine block.

3. Visual inspection: Once you've located the thermostat housing, look closely at the surrounding area of the engine block. The sensor is relatively small and may have a single or double wire connector attached to it.

4. Use online resources: Search online for "2003 Chevy Suburban ECT sensor location [your engine size]" You might find pictures or videos showing the sensor's location for your specific engine.

Caution: Be careful when working near hot engine components. Allow the engine to cool completely before attempting any inspection or repair.

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