* Transmission type: Different transmissions (4L60E, 4L80E, etc.) have slightly different operating characteristics.
* Ambient temperature: A hot day will naturally lead to higher transmission temperatures.
* Driving style: Aggressive driving, towing heavy loads, or prolonged idling will increase temperatures.
* Transmission fluid condition: Old or low fluid will cause higher operating temperatures.
However, a generally accepted range for *most* automatic transmissions, including those in a 2007 Silverado, is 170-220°F (77-104°C). Temperatures significantly above 220°F are cause for concern and indicate a potential problem.
To find a more precise range for *your* specific Silverado's transmission:
* Consult your owner's manual: It might give a recommended operating temperature range or at least mention signs of overheating.
* Use a transmission temperature gauge: These are aftermarket accessories that provide real-time temperature readings. This is the most accurate way to monitor your transmission's temperature.
Keep in mind that consistently high transmission temperatures can lead to premature wear and damage. If you suspect your transmission is running too hot, have it inspected by a qualified mechanic.
