To find it:
1. Consult a repair manual: This is the most reliable method. A Haynes or Chilton manual specific to your 1997 Buick Skylark will show you a diagram and detailed instructions. The manual will also specify the location based on your engine type.
2. Look near the crankshaft pulley: The CKP sensor is typically positioned near the crankshaft pulley, on the engine block itself. It's usually mounted on the bellhousing or the engine block near the transmission. It's often a small, black sensor with a single wire harness.
3. Use online resources: While less reliable than a manual, some online forums or websites dedicated to Buick Skylarks might have pictures or descriptions of the sensor's location for your specific engine. Search for "1997 Buick Skylark [3.1L V6 or 2.4L I4] crankshaft position sensor location".
Caution: Working on your car's engine requires some mechanical knowledge. If you're not comfortable doing this yourself, it's best to take your car to a qualified mechanic. Improper installation can cause serious engine damage.