Where is the temperature sending unit on a 2002 Pontiac grandprix?

The temperature sending unit (also called a coolant temperature sensor) on a 2002 Pontiac Grand Prix is located on the engine block, near the thermostat housing. It's usually a small, single-wire or two-wire sensor. However, there might be more than one; one for the gauge and another for the computer (ECM).

To be absolutely certain, you should:

* Consult a repair manual: A Haynes or Chilton manual specific to your 2002 Pontiac Grand Prix will have diagrams showing the exact location.

* Use a diagram: You can often find diagrams online by searching "2002 Pontiac Grand Prix coolant temperature sensor location." Be sure to specify the engine size (3.1L, 3.4L, or 3.8L) as the location might vary slightly.

Because of the potential for multiple sensors and slight variations depending on the engine, visually checking based on the above information is the best approach. Don't hesitate to use a repair manual or online diagram to confirm.