Where is the temperature sending unit located on a 4.3 Chevy Astro?

The temperature sending unit on a 4.3L Chevy Astro is typically located on the engine block, near the thermostat housing or close to the intake manifold. It's usually found on the driver's side of the engine, near the back. To access it, you may need to remove some components or wiring, depending on the specific layout of your vehicle. Always refer to a repair manual for detailed diagrams and procedures.