* Your vehicle's sticker: Look for a sticker on the driver's side doorjamb or inside the glove compartment. This sticker will list the maximum towing capacity for your specific vehicle.
* Your owner's manual: The owner's manual will also specify the towing capacity based on your Tahoe's configuration.
Without knowing the specific engine (4.8L, 5.3L, or 6.0L) and options (like the tow package), it's impossible to give you a definitive answer. However, expect the towing capacity to range from approximately 6,500 to 8,000 pounds, depending on those factors.