Where is heater valve on 1994 Chevy pick up?

The heater valve location on a 1994 Chevy pickup depends on the engine and body style (regular cab, extended cab, etc.). There isn't one single location. It's usually located somewhere in the engine compartment, near the firewall, and often close to the heater hoses.

To find it, you'll need to:

1. Consult a repair manual: A Haynes or Chilton repair manual specific to your 1994 Chevy pickup truck model (including engine size) will show you the exact location of the heater valve. This is the best and most reliable method.

2. Look near the firewall: Start by looking near the firewall on the passenger side of the engine compartment. Follow the heater hoses; the valve will be somewhere along their route.

3. Identify the hoses: The heater hoses are usually larger diameter than other hoses in the engine compartment. They'll be connected to the heater core (inside the dashboard). The valve will control the flow of coolant through these hoses.

4. Look for a valve with a cable or vacuum line: The valve itself may be a small, metal or plastic box with a cable connected to it (for cable-actuated systems) or a vacuum line (for vacuum-actuated systems).

Without knowing the specific engine and body style of your 1994 Chevy pickup, a more precise location cannot be given. Use a repair manual for your specific truck to ensure accurate identification.