* 4L60E: A four-speed automatic transmission. This was very common in the lighter-duty Silverado 1500 models.
* 4L80E: A four-speed automatic transmission, generally found in heavier-duty Silverado 2500 and 3500 models.
* Manual Transmissions: Various manual transmissions were also available, but automatic transmissions were much more common. The specific manual transmission would depend on the engine and trim level.
To know for sure what transmission is in *a specific* 2000 Chevy Silverado, you need to check the vehicle's identification number (VIN) or look at the transmission itself (usually stamped with identifying numbers).