Where is orifice tube on 2007 2500hd Chevy?

On a 2007 Chevy 2500HD, the orifice tube is located in the liquid line of the air conditioning system. To find it, trace the line from the condenser to the evaporator; the orifice tube is typically situated near the evaporator or firewall area. You may need to remove some components for easier access. Always refer to a service manual for specific details and diagrams.