Where is the heater control valve on 1995 GMC 1500?

The heater control valve on a 1995 GMC 1500 is typically located in the engine compartment, near the firewall on the passenger side of the vehicle. It is positioned in the heater hose line that runs from the engine to the heater core. To access it, you may need to remove some components or hoses obstructing your view. Always ensure the engine is cool before attempting to locate or service the valve.