Where is the crankshaft position sensor for 2009 silverado 5.3l located?

The crankshaft position sensor on a 2009 Chevy Silverado with a 5.3L engine is located on the lower rear of the engine block, near the transmission bellhousing. It is typically mounted in a position where it can read the crankshaft's position via a reluctor wheel. Accessing it may require removing components like the starter for better visibility.