To find the exact towing capacity for a *specific* 2011 Silverado 1500 with a 4.8L engine, you need to:
* Check the sticker: Look for the sticker on the driver's side doorjamb or inside the glove box. This sticker lists the maximum towing capacity for that *particular* vehicle. This is the most reliable source.
* Consult the owner's manual: The owner's manual will also specify the towing capacity based on the truck's configuration.
Without knowing the specific configuration of the truck, providing a precise towing capacity is impossible. However, expect the range to be generally lower than Silverados with the larger 5.3L or 6.2L engines. You might find figures in the 9,000-10,000 lb range, but that's only an estimate; it could be less. Always rely on the information from the vehicle's documentation.