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How hot should a 1989 Chevy silverado truck run?

The ideal operating temperature for a 1989 Chevy Silverado's engine is between 195°F and 220°F (90°C and 104°C). Anything significantly outside this range indicates a potential problem. Keep in mind that the exact number might vary slightly depending on the specific engine and ambient temperature. The gauge on your dash is an approximation. For a more precise reading, using an infrared thermometer pointed at the thermostat housing is recommended.