Where is temperature gauge sensor on 1988 Chevrolet g20 van?

The temperature gauge sensor on a 1988 Chevrolet G20 van is typically located on the engine block, near the thermostat housing. However, the exact location can vary slightly depending on the engine type (e.g., 4.3L V6, 5.0L V8, 5.7L V8, 6.2L V8, etc.).

To find it definitively, you'll need to:

1. Consult your owner's manual: This is the best resource for the specific location on your van's engine. The manual should have a diagram of the engine compartment.

2. Use a repair manual: A Haynes or Chilton repair manual for your specific year and engine will show a detailed diagram and location of the sensor.

3. Visually inspect the engine: Look for a single-wire or two-wire sensor that is near the thermostat housing and has a threaded connection to the engine block. It's often a small, cylindrical sensor. Be careful when looking; the engine will be hot if recently run.

4. Trace the wire: Follow the wire from the temperature gauge on your dashboard. This will lead you to the sensor. (This method is less reliable as wires can be routed differently than the factory routing.)

Keep in mind that the sensor might be difficult to see without removing some components, such as shrouding or hoses. If you are unsure, it's always best to consult a mechanic to avoid damaging anything.