Location of the temperature sending unit in a 1994 Chevrolet Astro V6 Vortec engine?

The temperature sending unit (also sometimes called a coolant temperature sensor) on a 1994 Chevrolet Astro van with the Vortec V6 engine is typically located on the cylinder head, near the thermostat housing. It's usually a single-wire sensor, although there might be a second sensor for the gauge.

However, precise location varies slightly depending on the specific engine configuration. It's best to:

1. Consult your 1994 Astro's repair manual: This will have a diagram showing the exact location and sometimes even a picture.

2. Use a Haynes or Chilton repair manual: These manuals offer detailed diagrams and descriptions.

3. Look online for diagrams: Search for "1994 Chevrolet Astro Vortec V6 coolant temperature sensor location" on sites like Google Images. Look for diagrams specific to your engine.

4. Visually inspect the engine: Look near the thermostat housing on the cylinder head for a sensor with a single or dual wire connector. It's usually a relatively small sensor.

Be cautious when working near hot engine components. Allow the engine to cool completely before attempting to locate or replace the sensor.