The spark plugs on the 2000 Nissan Sentra GXE are located on the top of the engine, under the ignition coils. To access them, you will need to remove the ignition coils.
Here are the steps on how to remove the spark plugs on a 2000 Nissan Sentra GXE:
1. Disconnect the negative battery terminal.
2. Remove the engine cover.
3. Remove the ignition coils by unbolting them and disconnecting the electrical connectors.
4. Once the ignition coils are removed, you will see the spark plugs.
5. Use a spark plug wrench to loosen and remove the spark plugs.
6. Inspect the spark plugs and replace them if necessary.
7. Screw in the new spark plugs by hand until they are snug.
8. Tighten the spark plugs with a spark plug wrench to the specified torque.
9. Reinstall the ignition coils and reconnect the electrical connectors.
10. Reinstall the engine cover.
11. Reconnect the negative battery terminal.