How much freon does a 2000 freightliner daycab need when empty?

A 2000 Freightliner Daycab typically requires about 2 to 3 pounds of Freon (R-134a) for its air conditioning system when empty. However, the exact amount can vary based on the specific model and configuration. It's important to consult the vehicle's service manual or an HVAC technician for precise specifications and to ensure proper charging of the system.