To find your heater control valve, you'll need to:
1. Determine your Grand Prix's year and engine: This information is crucial. The valve's location and even its design changed over the model years. Your vehicle's VIN (Vehicle Identification Number) will provide the most accurate information.
2. Consult a repair manual: A repair manual specific to your year and model Grand Prix will show you diagrams and instructions on locating and replacing the heater control valve. You can find these manuals online (often as PDFs) or at auto parts stores.
3. Search online forums: Search online forums dedicated to Pontiac Grand Prix owners. Searching for "[Your Year] Grand Prix heater control valve location" should yield helpful results and potentially pictures from other owners who've performed the repair.
General areas to check (but be aware these are *not* guaranteed):
* Engine compartment: Many heater control valves are located near the firewall, often close to the heater core hoses.
* Under the dash: Some models might have the valve accessible under the dashboard, though this is less common.
Without knowing the year and engine of your Grand Prix, I cannot provide a more specific location. Providing that information will greatly assist in finding the correct answer.
