Where is the temp gauge go into motor of 1991 silverado 5.7?

In a 1991 Chevrolet Silverado with a 5.7L engine, the temperature gauge sensor is typically located on the engine block, near the thermostat housing. It's often found on the driver's side, threaded into the intake manifold or cylinder head. This sensor sends temperature readings to the gauge on the dashboard, allowing you to monitor the engine's operating temperature. Make sure to consult the vehicle's service manual for the exact location and details.