The crankshaft sensor on a 1999 Aurora is located on the front of the engine, near the oil filter. To replace it, you will need to:
1. Disconnect the negative battery cable.
2. Remove the air cleaner housing.
3. Remove the serpentine belt.
4. Remove the crankshaft pulley.
5. Remove the timing belt cover.
6. Remove the crankshaft sensor.
7. Install the new crankshaft sensor.
8. Reinstall the timing belt cover.
9. Reinstall the crankshaft pulley.
10. Reinstall the serpentine belt.
11. Reinstall the air cleaner housing.
12. Reconnect the negative battery cable.
Here are some tips for replacing the crankshaft sensor on a 1999 Aurora:
* Be careful not to drop the crankshaft sensor into the engine.
* Use a new O-ring on the crankshaft sensor.
* Tighten the crankshaft sensor bolts to the specified torque.
* Make sure that the timing belt is properly tensioned.
If you are uncomfortable performing any of these steps, you should have the crankshaft sensor replaced by a qualified mechanic.
