Once you know the engine, you can use a repair manual specific to your year and engine to get precise instructions and diagrams. A Haynes or Chilton manual is a good place to start. Alternatively, you can find diagrams and videos online by searching "[your year] Pontiac Grand Am GT [your engine size] camshaft position sensor replacement".
General Location Possibilities and Commonalities:
The CMP sensor is usually located near the camshaft, often on the cylinder head or valve cover. It's usually a small, somewhat cylindrical sensor with a single wire connector. Common locations include:
* On the top of the engine: This is a relatively common spot, making access easier. You might need to remove parts like the valve cover or some wiring harnesses to reach it.
* On the side of the engine: Sometimes it's mounted on the side of the engine block near the camshaft. This location can be less accessible.
General Replacement Steps (but ALWAYS consult a repair manual for your specific engine):
1. Disconnect the battery: This is crucial to prevent electrical shocks and accidental short circuits.
2. Locate the sensor: Use your repair manual or online resources to pinpoint the exact location.
3. Disconnect the electrical connector: Carefully unplug the sensor's connector.
4. Remove the sensor: This might involve unscrewing it (usually a bolt or torx screw) or it may simply pull out. Again, your repair manual will show the correct method.
5. Clean the mounting surface: Use a clean cloth to remove any dirt or debris.
6. Install the new sensor: Carefully install the new sensor, ensuring it's seated correctly.
7. Reconnect the electrical connector: Make sure it's firmly plugged in.
8. Reconnect the battery:
9. Start the engine: Check for any error codes or unusual engine noises. If there are problems, you may need to double-check your work.
Important Considerations:
* Repair Manual: This is strongly recommended. Attempting this without a proper repair manual can lead to damage or injury.
* Tools: You'll need the right tools to remove the sensor and possibly other components.
* Torque Specifications: If you're using bolts, use the correct torque specification from the repair manual to avoid damaging the threads.
* Safety First: Disconnect the battery before starting any work and be cautious around moving parts and hot surfaces.
This information is for guidance only. Improper repair could damage your vehicle. If you are not comfortable performing this repair yourself, take your car to a qualified mechanic.
