* Crankshaft Position Sensor (CKP) location: This sensor is crucial for engine timing and is usually located near one of the crankshaft ends. Its exact position varies slightly depending on the specific engine configuration and year. You'll need a repair manual or a diagram specific to your 2001 Alero 3.4L to find its precise location.
* Balancer Shaft (if equipped): Some 3.4L engines have balancer shafts to reduce vibrations. Their location is integrated with the crankshaft assembly.
* Flywheel/Flexplate Bolt Holes: These are used to attach the flywheel (manual transmission) or flexplate (automatic transmission) to the crankshaft. They're located at the rear of the crankshaft.
* Main Bearing Journal Locations: These are the points where the crankshaft is supported by the engine block.
To find a specific location on the crankshaft, you *must* specify what you're looking for (e.g., CKP sensor location, flywheel bolt pattern, etc.). A repair manual for your specific year and model is your best resource. You can find these online or at auto parts stores.