Where is the engine temp sensor on a 1989 corvette?

The Engine Coolant Temperature (ECT) sensor on a 1989 Corvette is located on the cylinder head, usually near the thermostat housing. It's a single-wire sensor. However, the exact location might vary slightly depending on the engine (L98 or other).

To be certain, consult a 1989 Corvette repair manual or a wiring diagram specific to your engine. A visual inspection with the engine somewhat cool (but not cold) may be the best method. Look for a single-wire sensor near the thermostat housing on the cylinder head. Be careful not to burn yourself!