Where is the coolant temperature sensor located on a 2000 4.3L Chevy Astro Van?

The coolant temperature sensor (CTS) on a 2000 Chevy Astro van with the 4.3L Vortec V6 engine is typically located on the engine block, near the thermostat housing. It's usually a single-wire sensor, and it's important to note there might be *two* sensors near the thermostat; one is the CTS for the engine computer (PCM), and the other might be for the gauge on the dashboard. The one for the PCM is the one crucial for engine operation.

To be absolutely certain, you should:

* Consult your vehicle's repair manual: This is the most reliable way to pinpoint the exact location. A Haynes or Chilton manual specific to your year and engine will have diagrams.

* Look at online diagrams: Websites like AutoZone, Advance Auto Parts, and others often have diagrams you can browse by selecting your vehicle's year, make, model, and engine. These diagrams are usually free to access.

Without a visual aid specific to your vehicle, pinpointing the *exact* location is difficult, as slight variations can exist. However, the area near the thermostat housing on the engine block is the most common location.